/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:44:24,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:44:24,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:44:24,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:44:24,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:44:24,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:44:24,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:44:24,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:44:24,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:44:24,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:44:24,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:44:24,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:44:24,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:44:24,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:44:24,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:44:24,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:44:24,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:44:24,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:44:24,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:44:24,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:44:24,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:44:24,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:44:24,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:44:24,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:44:24,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:44:24,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:44:24,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:44:24,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:44:24,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:44:24,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:44:24,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:44:24,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:44:24,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:44:24,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:44:24,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:44:24,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:44:24,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:44:24,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:44:24,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:44:24,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:44:24,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:44:24,474 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 [2020-10-14 17:44:24,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:44:24,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:44:24,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:44:24,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:44:24,498 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:44:24,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:44:24,498 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:44:24,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:44:24,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:44:24,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:44:24,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:44:24,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:44:24,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:44:24,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:44:24,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:44:24,500 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:44:24,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:44:24,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:44:24,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:44:24,501 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:44:24,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:44:24,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:44:24,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:44:24,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:44:24,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:44:24,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:44:24,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:44:24,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:44:24,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:44:24,503 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:44:24,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:44:24,860 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:44:24,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:44:24,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:44:24,868 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:44:24,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2020-10-14 17:44:24,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30a096aeb/9c65be506ab24fb781ec36a1b451a0c7/FLAGf093deae5 [2020-10-14 17:44:25,354 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:44:25,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2020-10-14 17:44:25,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30a096aeb/9c65be506ab24fb781ec36a1b451a0c7/FLAGf093deae5 [2020-10-14 17:44:25,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30a096aeb/9c65be506ab24fb781ec36a1b451a0c7 [2020-10-14 17:44:25,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:44:25,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:44:25,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:44:25,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:44:25,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:44:25,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:44:25" (1/1) ... [2020-10-14 17:44:25,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c04ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25, skipping insertion in model container [2020-10-14 17:44:25,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:44:25" (1/1) ... [2020-10-14 17:44:25,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:44:25,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:44:25,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:44:25,940 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:44:25,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:44:25,983 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:44:25,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25 WrapperNode [2020-10-14 17:44:25,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:44:25,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:44:25,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:44:25,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:44:26,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25" (1/1) ... [2020-10-14 17:44:26,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25" (1/1) ... [2020-10-14 17:44:26,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25" (1/1) ... [2020-10-14 17:44:26,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25" (1/1) ... [2020-10-14 17:44:26,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25" (1/1) ... [2020-10-14 17:44:26,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25" (1/1) ... [2020-10-14 17:44:26,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25" (1/1) ... [2020-10-14 17:44:26,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:44:26,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:44:26,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:44:26,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:44:26,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:44:26,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:44:26,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:44:26,236 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:44:26,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:44:26,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:44:26,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:44:26,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:44:26,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:44:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:44:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:44:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:44:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:44:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:44:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:44:26,503 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:44:26,503 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 17:44:26,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:44:26 BoogieIcfgContainer [2020-10-14 17:44:26,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:44:26,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:44:26,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:44:26,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:44:26,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:44:25" (1/3) ... [2020-10-14 17:44:26,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c17ecf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:44:26, skipping insertion in model container [2020-10-14 17:44:26,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:44:25" (2/3) ... [2020-10-14 17:44:26,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c17ecf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:44:26, skipping insertion in model container [2020-10-14 17:44:26,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:44:26" (3/3) ... [2020-10-14 17:44:26,516 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2020-10-14 17:44:26,527 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:44:26,535 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:44:26,550 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:44:26,576 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:44:26,576 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:44:26,576 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:44:26,576 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:44:26,577 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:44:26,577 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:44:26,577 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:44:26,577 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:44:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-14 17:44:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 17:44:26,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:26,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:26,603 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:26,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1746448729, now seen corresponding path program 1 times [2020-10-14 17:44:26,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:26,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853162505] [2020-10-14 17:44:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:26,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:26,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:26,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:26,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:27,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:27,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 17:44:27,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:27,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-14 17:44:27,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:27,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:27,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:44:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:44:27,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:44:27,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:27,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:27,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:27,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:27,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:27,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 17:44:27,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:27,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:27,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:27,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:27,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:27,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:27,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853162505] [2020-10-14 17:44:27,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:27,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:44:27,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174543471] [2020-10-14 17:44:27,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:44:27,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:44:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:44:27,136 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-10-14 17:44:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:27,265 INFO L93 Difference]: Finished difference Result 61 states and 86 transitions. [2020-10-14 17:44:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:44:27,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 17:44:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:27,276 INFO L225 Difference]: With dead ends: 61 [2020-10-14 17:44:27,276 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 17:44:27,279 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 [2020-10-14 17:44:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 17:44:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 17:44:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 17:44:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-14 17:44:27,314 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-10-14 17:44:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:27,315 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-14 17:44:27,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:44:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-14 17:44:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 17:44:27,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:27,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:27,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:44:27,317 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1806235348, now seen corresponding path program 1 times [2020-10-14 17:44:27,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:27,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403547892] [2020-10-14 17:44:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:27,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:27,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:27,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:27,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:27,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 17:44:27,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:27,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-14 17:44:27,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:27,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:27,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:44:27,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:44:27,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 17:44:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 17:44:27,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:27,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:27,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:27,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:27,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:27,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:44:27,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:27,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:27,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:27,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403547892] [2020-10-14 17:44:27,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:27,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:44:27,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915807084] [2020-10-14 17:44:27,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:44:27,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:44:27,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:44:27,876 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-14 17:44:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:28,064 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-14 17:44:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:44:28,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 17:44:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:28,066 INFO L225 Difference]: With dead ends: 58 [2020-10-14 17:44:28,067 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 17:44:28,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:44:28,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 17:44:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-14 17:44:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 17:44:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-14 17:44:28,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-10-14 17:44:28,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:28,082 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-14 17:44:28,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:44:28,082 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-14 17:44:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 17:44:28,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:28,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:28,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:44:28,086 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:28,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:28,086 INFO L82 PathProgramCache]: Analyzing trace with hash 546939015, now seen corresponding path program 1 times [2020-10-14 17:44:28,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:28,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780511006] [2020-10-14 17:44:28,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:28,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:28,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:28,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:28,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 17:44:28,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-14 17:44:28,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:28,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:44:28,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 17:44:28,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:28,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:28,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:28,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:28,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:28,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:28,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:28,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:28,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:28,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:28,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:28,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:44:28,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780511006] [2020-10-14 17:44:28,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:28,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:28,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835204005] [2020-10-14 17:44:28,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:28,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:28,589 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 10 states. [2020-10-14 17:44:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:28,900 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-14 17:44:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:44:28,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-14 17:44:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:28,904 INFO L225 Difference]: With dead ends: 57 [2020-10-14 17:44:28,905 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 17:44:28,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:44:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 17:44:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-14 17:44:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 17:44:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-14 17:44:28,938 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2020-10-14 17:44:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:28,939 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-14 17:44:28,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-14 17:44:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 17:44:28,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:28,940 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:28,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:44:28,941 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:28,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:28,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1558056265, now seen corresponding path program 2 times [2020-10-14 17:44:28,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:28,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352743635] [2020-10-14 17:44:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:28,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:28,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:29,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 17:44:29,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:29,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-14 17:44:29,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:29,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:29,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:44:29,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:29,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:44:29,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 17:44:29,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:29,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:29,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:29,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:29,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:29,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:29,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:29,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:29,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:29,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:29,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352743635] [2020-10-14 17:44:29,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:29,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:44:29,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939575042] [2020-10-14 17:44:29,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:44:29,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:29,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:44:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:44:29,255 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2020-10-14 17:44:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:29,476 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2020-10-14 17:44:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:44:29,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-14 17:44:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:29,484 INFO L225 Difference]: With dead ends: 114 [2020-10-14 17:44:29,484 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 17:44:29,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:44:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 17:44:29,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2020-10-14 17:44:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 17:44:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-14 17:44:29,504 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 23 [2020-10-14 17:44:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:29,504 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-14 17:44:29,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:44:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-14 17:44:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 17:44:29,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:29,506 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 17:44:29,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:44:29,507 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:29,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:29,507 INFO L82 PathProgramCache]: Analyzing trace with hash -201627647, now seen corresponding path program 1 times [2020-10-14 17:44:29,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:29,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456438277] [2020-10-14 17:44:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:32,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 17:44:32,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:32,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3018 [2020-10-14 17:44:32,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:32,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:32,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:44:32,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:32,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 17:44:32,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:32,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:32,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:32,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:32,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:32,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:32,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:32,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:32,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 17:44:32,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456438277] [2020-10-14 17:44:32,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:32,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:44:32,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322647113] [2020-10-14 17:44:32,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:44:32,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:44:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:44:32,702 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 14 states. [2020-10-14 17:44:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:33,073 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-10-14 17:44:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:44:33,074 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-14 17:44:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:33,075 INFO L225 Difference]: With dead ends: 81 [2020-10-14 17:44:33,075 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 17:44:33,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:44:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 17:44:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2020-10-14 17:44:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 17:44:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-14 17:44:33,086 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2020-10-14 17:44:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:33,087 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-14 17:44:33,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:44:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-14 17:44:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 17:44:33,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:33,088 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:33,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:44:33,089 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash 819440707, now seen corresponding path program 1 times [2020-10-14 17:44:33,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:33,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234568947] [2020-10-14 17:44:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:33,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 17:44:33,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:33,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-14 17:44:33,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:33,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:44:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:44:33,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:33,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:33,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:33,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:33,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:33,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:33,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:33,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:33,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:33,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 17:44:33,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234568947] [2020-10-14 17:44:33,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:33,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:44:33,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839033836] [2020-10-14 17:44:33,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:44:33,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:33,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:44:33,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:44:33,929 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 8 states. [2020-10-14 17:44:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:34,204 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2020-10-14 17:44:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:44:34,204 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-14 17:44:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:34,206 INFO L225 Difference]: With dead ends: 148 [2020-10-14 17:44:34,206 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 17:44:34,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:44:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 17:44:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2020-10-14 17:44:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 17:44:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-14 17:44:34,217 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 29 [2020-10-14 17:44:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:34,218 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-14 17:44:34,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:44:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-14 17:44:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 17:44:34,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:34,219 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:34,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:44:34,220 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:34,220 INFO L82 PathProgramCache]: Analyzing trace with hash -65370896, now seen corresponding path program 1 times [2020-10-14 17:44:34,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:34,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449062994] [2020-10-14 17:44:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:34,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:35,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:35,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 17:44:35,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:35,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930 [2020-10-14 17:44:35,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:35,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:44:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 17:44:35,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:35,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:35,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:35,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:35,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:35,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:35,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:35,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:35,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:35,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:35,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:35,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:35,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 17:44:35,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449062994] [2020-10-14 17:44:35,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:35,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:44:35,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422957098] [2020-10-14 17:44:35,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:44:35,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:44:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:44:35,243 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 8 states. [2020-10-14 17:44:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:35,494 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2020-10-14 17:44:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:44:35,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-14 17:44:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:35,496 INFO L225 Difference]: With dead ends: 121 [2020-10-14 17:44:35,496 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 17:44:35,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:44:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 17:44:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2020-10-14 17:44:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 17:44:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-10-14 17:44:35,508 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 32 [2020-10-14 17:44:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:35,508 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-10-14 17:44:35,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:44:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-10-14 17:44:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 17:44:35,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:35,510 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:35,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:44:35,510 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1325915293, now seen corresponding path program 2 times [2020-10-14 17:44:35,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:35,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451754569] [2020-10-14 17:44:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:35,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:35,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:35,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:36,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:38,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 17:44:38,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:44:38,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2741 [2020-10-14 17:44:38,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:38,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:44:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 17:44:38,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:38,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:38,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:38,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:38,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:38,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:38,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:38,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:38,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:38,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:38,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:38,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 17:44:38,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451754569] [2020-10-14 17:44:38,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:38,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:44:38,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399392485] [2020-10-14 17:44:38,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:44:38,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:44:38,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:44:38,703 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 16 states. [2020-10-14 17:44:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:39,387 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2020-10-14 17:44:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:44:39,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-14 17:44:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:39,389 INFO L225 Difference]: With dead ends: 102 [2020-10-14 17:44:39,389 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 17:44:39,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:44:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 17:44:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2020-10-14 17:44:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 17:44:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-14 17:44:39,401 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 33 [2020-10-14 17:44:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:39,402 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-14 17:44:39,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:44:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-14 17:44:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 17:44:39,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:39,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:39,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:44:39,404 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:39,404 INFO L82 PathProgramCache]: Analyzing trace with hash -974907297, now seen corresponding path program 2 times [2020-10-14 17:44:39,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:39,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144664893] [2020-10-14 17:44:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:39,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:39,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:39,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:40,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:40,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 17:44:40,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:40,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-14 17:44:40,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:40,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:40,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:44:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:40,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:40,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:40,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:40,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:40,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:40,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:40,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:40,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:40,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:40,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:40,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:40,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 17:44:40,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144664893] [2020-10-14 17:44:40,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:40,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:44:40,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861359198] [2020-10-14 17:44:40,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:44:40,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:44:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:44:40,457 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 9 states. [2020-10-14 17:44:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:40,709 INFO L93 Difference]: Finished difference Result 194 states and 241 transitions. [2020-10-14 17:44:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:44:40,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-14 17:44:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:40,710 INFO L225 Difference]: With dead ends: 194 [2020-10-14 17:44:40,710 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 17:44:40,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:44:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 17:44:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-10-14 17:44:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 17:44:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-14 17:44:40,722 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 33 [2020-10-14 17:44:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:40,722 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-14 17:44:40,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:44:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-14 17:44:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 17:44:40,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:40,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:40,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:44:40,724 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:40,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1160849232, now seen corresponding path program 3 times [2020-10-14 17:44:40,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:40,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040286083] [2020-10-14 17:44:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:40,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:40,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:40,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:41,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:42,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:42,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 17:44:42,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:42,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1488 [2020-10-14 17:44:42,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:42,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:42,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:42,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:42,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 17:44:42,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:42,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:42,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:42,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:42,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:42,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:42,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:42,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:42,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:42,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 17:44:42,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040286083] [2020-10-14 17:44:42,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:42,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:44:42,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622607554] [2020-10-14 17:44:42,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:44:42,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:44:42,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:44:42,294 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 9 states. [2020-10-14 17:44:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:42,555 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2020-10-14 17:44:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:44:42,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-14 17:44:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:42,557 INFO L225 Difference]: With dead ends: 142 [2020-10-14 17:44:42,558 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 17:44:42,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:44:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 17:44:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 86. [2020-10-14 17:44:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 17:44:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2020-10-14 17:44:42,581 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 36 [2020-10-14 17:44:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:42,583 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2020-10-14 17:44:42,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:44:42,583 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2020-10-14 17:44:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:44:42,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:42,589 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:42,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:44:42,590 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1053623495, now seen corresponding path program 4 times [2020-10-14 17:44:42,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:42,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601578164] [2020-10-14 17:44:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:42,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:42,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:42,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:47,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:47,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 17:44:47,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:44:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4447 [2020-10-14 17:44:47,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:47,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:47,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:44:47,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:47,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 17:44:47,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:47,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:47,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:47,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:47,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:47,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:47,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:47,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:47,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:47,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:47,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:47,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 17:44:47,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601578164] [2020-10-14 17:44:47,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:47,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:44:47,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232797988] [2020-10-14 17:44:47,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:44:47,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:47,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:44:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:44:47,333 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 18 states. [2020-10-14 17:44:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:48,297 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2020-10-14 17:44:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:44:48,298 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-14 17:44:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:48,299 INFO L225 Difference]: With dead ends: 123 [2020-10-14 17:44:48,299 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 17:44:48,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:44:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 17:44:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2020-10-14 17:44:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 17:44:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-10-14 17:44:48,315 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 37 [2020-10-14 17:44:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:48,316 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-10-14 17:44:48,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:44:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-10-14 17:44:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:44:48,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:48,319 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:48,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:44:48,319 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:48,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1582169633, now seen corresponding path program 2 times [2020-10-14 17:44:48,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:48,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055641045] [2020-10-14 17:44:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:48,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:48,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:48,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:48,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:48,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:49,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 17:44:49,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:44:49,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-14 17:44:49,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:49,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:44:49,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:49,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:49,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:49,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:49,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:49,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:49,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:49,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:49,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:49,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:49,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:49,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 17:44:49,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055641045] [2020-10-14 17:44:49,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:49,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:44:49,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862397398] [2020-10-14 17:44:49,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:44:49,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:49,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:44:49,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:44:49,430 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 9 states. [2020-10-14 17:44:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:49,698 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2020-10-14 17:44:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:44:49,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-14 17:44:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:49,701 INFO L225 Difference]: With dead ends: 159 [2020-10-14 17:44:49,701 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 17:44:49,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:44:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 17:44:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 107. [2020-10-14 17:44:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 17:44:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2020-10-14 17:44:49,714 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 37 [2020-10-14 17:44:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:49,715 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2020-10-14 17:44:49,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:44:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2020-10-14 17:44:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:44:49,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:49,716 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:49,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:44:49,716 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:49,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:49,716 INFO L82 PathProgramCache]: Analyzing trace with hash -235975045, now seen corresponding path program 3 times [2020-10-14 17:44:49,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:49,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119863441] [2020-10-14 17:44:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:49,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:50,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:50,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 17:44:50,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:50,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1233 [2020-10-14 17:44:50,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:50,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:50,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:44:50,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:50,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:44:50,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:51,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:51,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:51,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:51,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:51,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:51,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:51,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:51,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:51,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:51,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 17:44:51,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119863441] [2020-10-14 17:44:51,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:51,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:51,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721302897] [2020-10-14 17:44:51,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:51,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:51,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:51,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:51,028 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 10 states. [2020-10-14 17:44:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:51,385 INFO L93 Difference]: Finished difference Result 246 states and 305 transitions. [2020-10-14 17:44:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:44:51,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-14 17:44:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:51,387 INFO L225 Difference]: With dead ends: 246 [2020-10-14 17:44:51,387 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 17:44:51,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:44:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 17:44:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 105. [2020-10-14 17:44:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 17:44:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-10-14 17:44:51,401 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 37 [2020-10-14 17:44:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:51,401 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-10-14 17:44:51,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-10-14 17:44:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 17:44:51,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:51,402 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:51,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:44:51,403 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:51,403 INFO L82 PathProgramCache]: Analyzing trace with hash -499666768, now seen corresponding path program 5 times [2020-10-14 17:44:51,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:51,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217060087] [2020-10-14 17:44:51,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:51,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:51,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:51,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:51,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:53,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:53,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 17:44:53,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:53,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1775 [2020-10-14 17:44:53,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:53,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:44:53,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:53,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 17:44:53,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:53,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:53,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:53,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:53,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:53,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:53,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:53,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:53,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:53,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:53,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 17:44:53,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217060087] [2020-10-14 17:44:53,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:53,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:53,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756378905] [2020-10-14 17:44:53,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:53,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:53,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:53,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:53,259 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 10 states. [2020-10-14 17:44:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:53,608 INFO L93 Difference]: Finished difference Result 171 states and 208 transitions. [2020-10-14 17:44:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:44:53,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-14 17:44:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:53,611 INFO L225 Difference]: With dead ends: 171 [2020-10-14 17:44:53,611 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 17:44:53,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:44:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 17:44:53,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 107. [2020-10-14 17:44:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 17:44:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2020-10-14 17:44:53,634 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 40 [2020-10-14 17:44:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:53,635 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2020-10-14 17:44:53,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2020-10-14 17:44:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 17:44:53,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:53,636 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:53,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:44:53,637 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash -136199211, now seen corresponding path program 6 times [2020-10-14 17:44:53,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:53,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414158932] [2020-10-14 17:44:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:53,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:53,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:54,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:54,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:54,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:54,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:55,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:58,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:58,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 17:44:58,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:44:58,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4400 [2020-10-14 17:44:58,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:58,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:58,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:44:58,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:58,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:44:58,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:58,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:58,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:58,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:58,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:58,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:58,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:58,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:58,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:58,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 17:44:58,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414158932] [2020-10-14 17:44:58,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:58,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:44:58,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193102416] [2020-10-14 17:44:58,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:44:58,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:58,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:44:58,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:44:58,127 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 11 states. [2020-10-14 17:44:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:58,528 INFO L93 Difference]: Finished difference Result 262 states and 326 transitions. [2020-10-14 17:44:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:44:58,528 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-14 17:44:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:58,530 INFO L225 Difference]: With dead ends: 262 [2020-10-14 17:44:58,531 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 17:44:58,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:44:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 17:44:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 111. [2020-10-14 17:44:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 17:44:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2020-10-14 17:44:58,549 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 41 [2020-10-14 17:44:58,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:58,550 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2020-10-14 17:44:58,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:44:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2020-10-14 17:44:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 17:44:58,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:58,551 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:58,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:44:58,551 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:58,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1641049627, now seen corresponding path program 7 times [2020-10-14 17:44:58,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:58,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618067351] [2020-10-14 17:44:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:58,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:58,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:58,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:58,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:59,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:59,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 17:44:59,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:44:59,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1108 [2020-10-14 17:44:59,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:59,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:59,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:44:59,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:44:59,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:44:59,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:59,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:59,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:59,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:59,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:59,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:59,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:59,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:59,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:59,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:59,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:59,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:44:59,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618067351] [2020-10-14 17:44:59,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:59,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:59,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146921728] [2020-10-14 17:44:59,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:59,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:59,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:59,735 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand 10 states. [2020-10-14 17:45:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:00,065 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2020-10-14 17:45:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:45:00,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-14 17:45:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:00,067 INFO L225 Difference]: With dead ends: 177 [2020-10-14 17:45:00,067 INFO L226 Difference]: Without dead ends: 159 [2020-10-14 17:45:00,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:45:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-14 17:45:00,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2020-10-14 17:45:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 17:45:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2020-10-14 17:45:00,080 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 43 [2020-10-14 17:45:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:00,081 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2020-10-14 17:45:00,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:45:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2020-10-14 17:45:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:45:00,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:00,081 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:00,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:45:00,081 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -711487306, now seen corresponding path program 3 times [2020-10-14 17:45:00,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:00,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441318977] [2020-10-14 17:45:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:00,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:00,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:00,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:00,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:00,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:01,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:01,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:45:01,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:45:01,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1158 [2020-10-14 17:45:01,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:01,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:01,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:45:01,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:01,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 17:45:01,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:01,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:01,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:01,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:01,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:01,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:01,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:01,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:45:01,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441318977] [2020-10-14 17:45:01,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:01,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:45:01,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546099358] [2020-10-14 17:45:01,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:45:01,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:01,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:45:01,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:45:01,321 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 10 states. [2020-10-14 17:45:01,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:01,628 INFO L93 Difference]: Finished difference Result 182 states and 222 transitions. [2020-10-14 17:45:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:45:01,629 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-14 17:45:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:01,630 INFO L225 Difference]: With dead ends: 182 [2020-10-14 17:45:01,631 INFO L226 Difference]: Without dead ends: 164 [2020-10-14 17:45:01,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:45:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-14 17:45:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 126. [2020-10-14 17:45:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 17:45:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2020-10-14 17:45:01,655 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 44 [2020-10-14 17:45:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:01,656 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2020-10-14 17:45:01,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:45:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2020-10-14 17:45:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:45:01,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:01,657 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:01,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:45:01,657 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1765335312, now seen corresponding path program 8 times [2020-10-14 17:45:01,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:01,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004374322] [2020-10-14 17:45:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:01,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:01,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:03,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:03,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:45:03,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:45:03,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1338 [2020-10-14 17:45:03,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:03,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:03,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:45:03,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:03,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 17:45:03,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:03,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:03,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:03,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:03,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:03,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:03,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:03,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:03,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:03,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:45:03,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004374322] [2020-10-14 17:45:03,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:03,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:45:03,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414583545] [2020-10-14 17:45:03,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:45:03,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:03,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:45:03,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:45:03,080 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand 11 states. [2020-10-14 17:45:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:03,473 INFO L93 Difference]: Finished difference Result 197 states and 238 transitions. [2020-10-14 17:45:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:45:03,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-14 17:45:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:03,475 INFO L225 Difference]: With dead ends: 197 [2020-10-14 17:45:03,475 INFO L226 Difference]: Without dead ends: 179 [2020-10-14 17:45:03,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:45:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-14 17:45:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 120. [2020-10-14 17:45:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-14 17:45:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2020-10-14 17:45:03,496 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 44 [2020-10-14 17:45:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:03,496 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2020-10-14 17:45:03,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:45:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2020-10-14 17:45:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 17:45:03,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:03,498 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:03,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:45:03,498 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1534670449, now seen corresponding path program 9 times [2020-10-14 17:45:03,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:03,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007166361] [2020-10-14 17:45:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:03,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:03,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:04,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:04,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:05,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:05,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:05,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:08,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:08,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 17:45:08,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:45:08,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:45:08,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:08,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:08,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:45:08,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:08,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:45:08,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:08,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:08,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:08,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:08,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:08,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:08,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:08,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:08,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:08,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:45:08,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007166361] [2020-10-14 17:45:08,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:08,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:45:08,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844211543] [2020-10-14 17:45:08,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:45:08,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:08,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:45:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:45:08,600 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand 12 states. [2020-10-14 17:45:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:09,063 INFO L93 Difference]: Finished difference Result 294 states and 368 transitions. [2020-10-14 17:45:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:45:09,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-14 17:45:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:09,065 INFO L225 Difference]: With dead ends: 294 [2020-10-14 17:45:09,065 INFO L226 Difference]: Without dead ends: 193 [2020-10-14 17:45:09,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:45:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-14 17:45:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 124. [2020-10-14 17:45:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 17:45:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2020-10-14 17:45:09,080 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 45 [2020-10-14 17:45:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:09,081 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2020-10-14 17:45:09,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:45:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2020-10-14 17:45:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 17:45:09,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:09,082 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:09,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:45:09,082 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:09,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1685415863, now seen corresponding path program 10 times [2020-10-14 17:45:09,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:09,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656351709] [2020-10-14 17:45:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:09,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:09,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:09,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:09,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:10,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:10,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 17:45:10,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:45:10,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1567 [2020-10-14 17:45:10,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:10,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:10,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:45:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:45:10,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:10,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:10,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:10,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:10,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:10,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:10,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:10,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:10,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:10,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:10,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:10,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 17:45:10,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656351709] [2020-10-14 17:45:10,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:10,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:45:10,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304960662] [2020-10-14 17:45:10,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:45:10,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:10,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:45:10,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:45:10,736 INFO L87 Difference]: Start difference. First operand 124 states and 151 transitions. Second operand 11 states. [2020-10-14 17:45:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:11,110 INFO L93 Difference]: Finished difference Result 198 states and 240 transitions. [2020-10-14 17:45:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:45:11,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-14 17:45:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:11,111 INFO L225 Difference]: With dead ends: 198 [2020-10-14 17:45:11,112 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 17:45:11,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:45:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 17:45:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 126. [2020-10-14 17:45:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 17:45:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2020-10-14 17:45:11,131 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 47 [2020-10-14 17:45:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:11,131 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2020-10-14 17:45:11,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:45:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2020-10-14 17:45:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 17:45:11,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:11,132 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:11,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:45:11,133 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1196420494, now seen corresponding path program 11 times [2020-10-14 17:45:11,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:11,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495960620] [2020-10-14 17:45:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:11,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:11,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:11,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:11,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:12,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:12,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:12,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:12,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:12,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:12,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:13,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:13,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:13,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:13,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:14,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:14,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:14,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:14,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:15,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:16,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:16,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 17:45:16,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 17:45:16,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:45:16,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:16,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:16,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:45:16,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:16,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 17:45:16,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:16,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:16,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:16,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:16,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:16,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:16,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:16,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:16,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:16,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:45:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 17:45:16,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495960620] [2020-10-14 17:45:16,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:16,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:45:16,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107200153] [2020-10-14 17:45:16,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:45:16,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:16,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:45:16,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:45:16,273 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand 12 states. [2020-10-14 17:45:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:16,787 INFO L93 Difference]: Finished difference Result 210 states and 256 transitions. [2020-10-14 17:45:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:45:16,788 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-14 17:45:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:16,790 INFO L225 Difference]: With dead ends: 210 [2020-10-14 17:45:16,790 INFO L226 Difference]: Without dead ends: 199 [2020-10-14 17:45:16,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:45:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-14 17:45:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 126. [2020-10-14 17:45:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 17:45:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2020-10-14 17:45:16,814 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 48 [2020-10-14 17:45:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:16,815 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2020-10-14 17:45:16,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:45:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2020-10-14 17:45:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 17:45:16,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:16,816 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:16,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:45:16,817 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2143344278, now seen corresponding path program 12 times [2020-10-14 17:45:16,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:16,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739680848] [2020-10-14 17:45:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:16,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:16,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:16,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:16,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:16,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:18,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:18,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 17:45:18,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:45:18,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-14 17:45:18,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:18,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:18,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:45:18,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:18,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 17:45:18,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:18,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:18,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:18,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:18,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:18,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:18,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:18,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:18,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:18,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:18,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:18,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:18,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 17:45:18,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739680848] [2020-10-14 17:45:18,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:18,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:45:18,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120607850] [2020-10-14 17:45:18,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:45:18,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:18,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:45:18,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:45:18,681 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand 11 states. [2020-10-14 17:45:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:19,046 INFO L93 Difference]: Finished difference Result 199 states and 241 transitions. [2020-10-14 17:45:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:45:19,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-14 17:45:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:19,051 INFO L225 Difference]: With dead ends: 199 [2020-10-14 17:45:19,051 INFO L226 Difference]: Without dead ends: 181 [2020-10-14 17:45:19,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:45:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-14 17:45:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 128. [2020-10-14 17:45:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 17:45:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 155 transitions. [2020-10-14 17:45:19,067 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 155 transitions. Word has length 48 [2020-10-14 17:45:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:19,067 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 155 transitions. [2020-10-14 17:45:19,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:45:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 155 transitions. [2020-10-14 17:45:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 17:45:19,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:19,068 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:19,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:45:19,069 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:19,069 INFO L82 PathProgramCache]: Analyzing trace with hash 794710797, now seen corresponding path program 13 times [2020-10-14 17:45:19,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:19,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226120464] [2020-10-14 17:45:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:19,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:19,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:19,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:19,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:20,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:20,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:20,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:21,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:23,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:24,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:24,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 17:45:24,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:45:24,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:45:24,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:24,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:45:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:45:24,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:24,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:24,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:24,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:24,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:24,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:45:24,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:24,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:24,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:24,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:24,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 17:45:24,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226120464] [2020-10-14 17:45:24,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:24,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:45:24,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252545185] [2020-10-14 17:45:24,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:45:24,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:24,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:45:24,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:45:24,183 INFO L87 Difference]: Start difference. First operand 128 states and 155 transitions. Second operand 13 states. [2020-10-14 17:45:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:24,720 INFO L93 Difference]: Finished difference Result 328 states and 408 transitions. [2020-10-14 17:45:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:45:24,720 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-14 17:45:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:24,723 INFO L225 Difference]: With dead ends: 328 [2020-10-14 17:45:24,723 INFO L226 Difference]: Without dead ends: 221 [2020-10-14 17:45:24,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:45:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-14 17:45:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 132. [2020-10-14 17:45:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 17:45:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2020-10-14 17:45:24,741 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 49 [2020-10-14 17:45:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:24,741 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2020-10-14 17:45:24,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:45:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2020-10-14 17:45:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 17:45:24,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:24,742 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:24,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:45:24,743 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash 504150777, now seen corresponding path program 4 times [2020-10-14 17:45:24,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:24,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927625640] [2020-10-14 17:45:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:24,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:24,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:24,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:24,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:24,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:24,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:26,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:26,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 17:45:26,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:45:26,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2200 [2020-10-14 17:45:26,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:26,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:45:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:45:26,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:27,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:27,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:27,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:27,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:27,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:27,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:27,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:27,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:27,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:27,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:45:27,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927625640] [2020-10-14 17:45:27,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:27,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:45:27,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072189550] [2020-10-14 17:45:27,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:45:27,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:45:27,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:45:27,036 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand 11 states. [2020-10-14 17:45:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:27,399 INFO L93 Difference]: Finished difference Result 206 states and 251 transitions. [2020-10-14 17:45:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:45:27,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-14 17:45:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:27,401 INFO L225 Difference]: With dead ends: 206 [2020-10-14 17:45:27,401 INFO L226 Difference]: Without dead ends: 188 [2020-10-14 17:45:27,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:45:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-14 17:45:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2020-10-14 17:45:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 17:45:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 176 transitions. [2020-10-14 17:45:27,421 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 176 transitions. Word has length 51 [2020-10-14 17:45:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:27,421 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 176 transitions. [2020-10-14 17:45:27,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:45:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 176 transitions. [2020-10-14 17:45:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 17:45:27,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:27,422 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:27,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:45:27,423 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:27,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1313993901, now seen corresponding path program 14 times [2020-10-14 17:45:27,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:27,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473165267] [2020-10-14 17:45:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:27,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:29,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 17:45:29,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:45:29,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2302 [2020-10-14 17:45:29,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:29,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:29,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:45:29,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:29,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:45:29,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:29,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:29,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:29,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:29,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:29,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:29,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:29,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:29,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:45:29,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473165267] [2020-10-14 17:45:29,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:29,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:45:29,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179957970] [2020-10-14 17:45:29,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:45:29,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:29,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:45:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:45:29,824 INFO L87 Difference]: Start difference. First operand 145 states and 176 transitions. Second operand 12 states. [2020-10-14 17:45:30,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:30,277 INFO L93 Difference]: Finished difference Result 226 states and 272 transitions. [2020-10-14 17:45:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:45:30,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-14 17:45:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:30,279 INFO L225 Difference]: With dead ends: 226 [2020-10-14 17:45:30,279 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 17:45:30,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:45:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 17:45:30,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 139. [2020-10-14 17:45:30,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 17:45:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 170 transitions. [2020-10-14 17:45:30,298 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 170 transitions. Word has length 51 [2020-10-14 17:45:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:30,298 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 170 transitions. [2020-10-14 17:45:30,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:45:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 170 transitions. [2020-10-14 17:45:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 17:45:30,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:30,299 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:30,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:45:30,300 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:30,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:30,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1672980398, now seen corresponding path program 15 times [2020-10-14 17:45:30,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:30,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376257338] [2020-10-14 17:45:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:30,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:30,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:31,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:31,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:31,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:32,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:32,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:33,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:33,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:33,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:33,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:35,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:35,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 17:45:35,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 17:45:35,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:45:35,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:35,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:35,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:45:35,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:35,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 17:45:35,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:35,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:35,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:35,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:35,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:35,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:35,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:35,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:35,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:35,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:45:35,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376257338] [2020-10-14 17:45:35,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:35,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:45:35,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733125173] [2020-10-14 17:45:35,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:45:35,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:35,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:45:35,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:45:35,411 INFO L87 Difference]: Start difference. First operand 139 states and 170 transitions. Second operand 13 states. [2020-10-14 17:45:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:35,916 INFO L93 Difference]: Finished difference Result 233 states and 285 transitions. [2020-10-14 17:45:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:45:35,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-14 17:45:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:35,919 INFO L225 Difference]: With dead ends: 233 [2020-10-14 17:45:35,919 INFO L226 Difference]: Without dead ends: 222 [2020-10-14 17:45:35,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:45:35,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-14 17:45:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 139. [2020-10-14 17:45:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 17:45:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 170 transitions. [2020-10-14 17:45:35,937 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 170 transitions. Word has length 52 [2020-10-14 17:45:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:35,938 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 170 transitions. [2020-10-14 17:45:35,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:45:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 170 transitions. [2020-10-14 17:45:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 17:45:35,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:35,938 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:35,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:45:35,939 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash -499604618, now seen corresponding path program 16 times [2020-10-14 17:45:35,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:35,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238987368] [2020-10-14 17:45:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:35,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:35,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:35,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:35,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:35,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:36,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:38,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:38,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 17:45:38,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:45:38,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2115 [2020-10-14 17:45:38,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:38,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:38,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:45:38,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:38,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 17:45:38,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:38,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:38,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:38,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:38,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:38,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:38,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:38,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:38,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:38,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:38,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:38,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:38,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:45:38,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238987368] [2020-10-14 17:45:38,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:38,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:45:38,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332281376] [2020-10-14 17:45:38,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:45:38,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:38,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:45:38,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:45:38,151 INFO L87 Difference]: Start difference. First operand 139 states and 170 transitions. Second operand 12 states. [2020-10-14 17:45:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:38,613 INFO L93 Difference]: Finished difference Result 222 states and 269 transitions. [2020-10-14 17:45:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:45:38,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-14 17:45:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:38,615 INFO L225 Difference]: With dead ends: 222 [2020-10-14 17:45:38,616 INFO L226 Difference]: Without dead ends: 204 [2020-10-14 17:45:38,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:45:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-14 17:45:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 141. [2020-10-14 17:45:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 17:45:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2020-10-14 17:45:38,639 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 52 [2020-10-14 17:45:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:38,639 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2020-10-14 17:45:38,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:45:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2020-10-14 17:45:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 17:45:38,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:38,640 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:38,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:45:38,641 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:38,641 INFO L82 PathProgramCache]: Analyzing trace with hash -862600369, now seen corresponding path program 17 times [2020-10-14 17:45:38,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:38,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417428889] [2020-10-14 17:45:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:38,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:38,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:39,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:39,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:39,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:39,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:40,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:40,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:40,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:41,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:41,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:41,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:42,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:43,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:43,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:43,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:43,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:43,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 17:45:43,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-14 17:45:43,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:45:43,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:43,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:45:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:45:43,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:43,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:43,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:43,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:43,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:43,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:43,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:43,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:43,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:43,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:43,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:43,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:43,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:45:43,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417428889] [2020-10-14 17:45:43,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:43,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:45:43,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216400480] [2020-10-14 17:45:43,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:45:43,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:43,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:45:43,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:45:43,758 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand 13 states. [2020-10-14 17:45:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:44,251 INFO L93 Difference]: Finished difference Result 238 states and 289 transitions. [2020-10-14 17:45:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:45:44,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-14 17:45:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:44,259 INFO L225 Difference]: With dead ends: 238 [2020-10-14 17:45:44,259 INFO L226 Difference]: Without dead ends: 227 [2020-10-14 17:45:44,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:45:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-14 17:45:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 141. [2020-10-14 17:45:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 17:45:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2020-10-14 17:45:44,279 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 53 [2020-10-14 17:45:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:44,279 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2020-10-14 17:45:44,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:45:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2020-10-14 17:45:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 17:45:44,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:44,280 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:44,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:45:44,281 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1309271639, now seen corresponding path program 18 times [2020-10-14 17:45:44,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:44,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098049223] [2020-10-14 17:45:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:44,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:44,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:45,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:45,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:47,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:48,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:48,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:49,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:49,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 17:45:49,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:45:49,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:45:49,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:49,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:45:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:45:49,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:49,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:49,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:49,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:49,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:49,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:49,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:49,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:45:49,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098049223] [2020-10-14 17:45:49,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:49,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:45:49,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458626353] [2020-10-14 17:45:49,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:45:49,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:49,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:45:49,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:45:49,416 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand 14 states. [2020-10-14 17:45:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:50,008 INFO L93 Difference]: Finished difference Result 360 states and 450 transitions. [2020-10-14 17:45:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:45:50,009 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-14 17:45:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:50,011 INFO L225 Difference]: With dead ends: 360 [2020-10-14 17:45:50,011 INFO L226 Difference]: Without dead ends: 242 [2020-10-14 17:45:50,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:45:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-14 17:45:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 145. [2020-10-14 17:45:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 17:45:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 176 transitions. [2020-10-14 17:45:50,035 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 176 transitions. Word has length 53 [2020-10-14 17:45:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:50,035 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 176 transitions. [2020-10-14 17:45:50,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:45:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 176 transitions. [2020-10-14 17:45:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 17:45:50,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:50,036 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:50,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:45:50,036 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:50,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1309624555, now seen corresponding path program 19 times [2020-10-14 17:45:50,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:50,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111825736] [2020-10-14 17:45:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:50,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:50,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:50,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:50,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:50,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:50,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:50,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:52,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:52,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 17:45:52,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:45:52,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2761 [2020-10-14 17:45:52,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:52,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:45:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:45:52,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:52,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:52,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:52,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:52,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:52,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:52,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:52,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:52,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:52,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:52,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:52,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:52,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 17:45:52,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111825736] [2020-10-14 17:45:52,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:52,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:45:52,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394200350] [2020-10-14 17:45:52,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:45:52,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:45:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:45:52,896 INFO L87 Difference]: Start difference. First operand 145 states and 176 transitions. Second operand 12 states. [2020-10-14 17:45:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:53,326 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2020-10-14 17:45:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:45:53,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-14 17:45:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:53,329 INFO L225 Difference]: With dead ends: 225 [2020-10-14 17:45:53,329 INFO L226 Difference]: Without dead ends: 207 [2020-10-14 17:45:53,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:45:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-14 17:45:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 147. [2020-10-14 17:45:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 17:45:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2020-10-14 17:45:53,353 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 55 [2020-10-14 17:45:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:53,353 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2020-10-14 17:45:53,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:45:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2020-10-14 17:45:53,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 17:45:53,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:53,354 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:53,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:45:53,354 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:53,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:53,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1843944142, now seen corresponding path program 20 times [2020-10-14 17:45:53,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:53,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185907553] [2020-10-14 17:45:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:53,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:53,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:54,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:54,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:55,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:55,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:56,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:56,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:56,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:57,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:57,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:57,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:58,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:58,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:58,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 17:45:58,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 17:45:58,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 17:45:58,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:58,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:58,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:45:58,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:45:58,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 17:45:58,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:58,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:58,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:58,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:58,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:58,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:58,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:58,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:58,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:58,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:58,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 17:45:58,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185907553] [2020-10-14 17:45:58,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:58,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:45:58,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51265538] [2020-10-14 17:45:58,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:45:58,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:58,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:45:58,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:45:58,504 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand 14 states. [2020-10-14 17:45:59,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:59,072 INFO L93 Difference]: Finished difference Result 263 states and 321 transitions. [2020-10-14 17:45:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:45:59,072 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-14 17:45:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:59,075 INFO L225 Difference]: With dead ends: 263 [2020-10-14 17:45:59,075 INFO L226 Difference]: Without dead ends: 252 [2020-10-14 17:45:59,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:45:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-14 17:45:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 147. [2020-10-14 17:45:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 17:45:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2020-10-14 17:45:59,100 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 56 [2020-10-14 17:45:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:59,100 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2020-10-14 17:45:59,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:45:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2020-10-14 17:45:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 17:45:59,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:59,101 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:59,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:45:59,102 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:59,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1988073732, now seen corresponding path program 5 times [2020-10-14 17:45:59,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:59,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540173691] [2020-10-14 17:45:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:59,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:02,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:02,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 17:46:02,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:46:02,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3205 [2020-10-14 17:46:02,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:02,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:46:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 17:46:02,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:02,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:02,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:02,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:02,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:02,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:02,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:02,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:02,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:02,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:02,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:02,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:02,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 17:46:02,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540173691] [2020-10-14 17:46:02,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:02,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:46:02,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820151679] [2020-10-14 17:46:02,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:46:02,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:02,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:46:02,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:46:02,408 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand 12 states. [2020-10-14 17:46:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:02,845 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2020-10-14 17:46:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:46:02,846 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-14 17:46:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:02,848 INFO L225 Difference]: With dead ends: 226 [2020-10-14 17:46:02,848 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 17:46:02,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:46:02,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 17:46:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2020-10-14 17:46:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 17:46:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 195 transitions. [2020-10-14 17:46:02,884 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 195 transitions. Word has length 56 [2020-10-14 17:46:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:02,884 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 195 transitions. [2020-10-14 17:46:02,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:46:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 195 transitions. [2020-10-14 17:46:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 17:46:02,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:02,885 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:02,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:46:02,886 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:02,886 INFO L82 PathProgramCache]: Analyzing trace with hash 488748886, now seen corresponding path program 21 times [2020-10-14 17:46:02,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:02,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086687842] [2020-10-14 17:46:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:02,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:02,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:02,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:02,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:02,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:02,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:06,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:06,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 17:46:06,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:46:06,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3318 [2020-10-14 17:46:06,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:06,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:46:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 17:46:06,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:06,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:06,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:06,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:06,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:06,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:06,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:46:06,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:06,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 17:46:06,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086687842] [2020-10-14 17:46:06,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:06,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:46:06,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013357900] [2020-10-14 17:46:06,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:46:06,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:46:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:46:06,324 INFO L87 Difference]: Start difference. First operand 160 states and 195 transitions. Second operand 13 states. [2020-10-14 17:46:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:06,918 INFO L93 Difference]: Finished difference Result 252 states and 303 transitions. [2020-10-14 17:46:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:46:06,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-14 17:46:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:06,921 INFO L225 Difference]: With dead ends: 252 [2020-10-14 17:46:06,921 INFO L226 Difference]: Without dead ends: 234 [2020-10-14 17:46:06,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:46:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-14 17:46:06,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 154. [2020-10-14 17:46:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 17:46:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 189 transitions. [2020-10-14 17:46:06,953 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 189 transitions. Word has length 56 [2020-10-14 17:46:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:06,953 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 189 transitions. [2020-10-14 17:46:06,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:46:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 189 transitions. [2020-10-14 17:46:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 17:46:06,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:06,956 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:06,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:46:06,956 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash 771842667, now seen corresponding path program 22 times [2020-10-14 17:46:06,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:06,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381043916] [2020-10-14 17:46:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:06,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:08,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:09,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:10,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:10,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:10,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:11,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:11,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:11,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:11,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:11,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:11,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:11,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 17:46:11,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 17:46:11,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:46:11,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:11,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:46:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:46:11,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:12,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:12,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:12,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:12,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:12,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 17:46:12,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381043916] [2020-10-14 17:46:12,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:12,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:46:12,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971297752] [2020-10-14 17:46:12,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:46:12,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:46:12,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:46:12,097 INFO L87 Difference]: Start difference. First operand 154 states and 189 transitions. Second operand 14 states. [2020-10-14 17:46:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:12,694 INFO L93 Difference]: Finished difference Result 263 states and 320 transitions. [2020-10-14 17:46:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:46:12,695 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-14 17:46:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:12,697 INFO L225 Difference]: With dead ends: 263 [2020-10-14 17:46:12,697 INFO L226 Difference]: Without dead ends: 252 [2020-10-14 17:46:12,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:46:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-14 17:46:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 154. [2020-10-14 17:46:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 17:46:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 189 transitions. [2020-10-14 17:46:12,726 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 189 transitions. Word has length 57 [2020-10-14 17:46:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:12,726 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 189 transitions. [2020-10-14 17:46:12,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:46:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 189 transitions. [2020-10-14 17:46:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 17:46:12,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:12,728 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:12,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:46:12,728 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1017481797, now seen corresponding path program 23 times [2020-10-14 17:46:12,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:12,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040694302] [2020-10-14 17:46:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:12,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:12,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:14,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:14,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:15,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:15,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:15,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:17,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:17,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:17,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 17:46:17,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:46:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:46:17,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:17,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:46:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:46:17,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:17,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:17,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:17,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:17,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:17,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:17,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:17,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:17,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:17,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:17,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:17,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:17,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 17:46:17,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040694302] [2020-10-14 17:46:17,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:17,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:46:17,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639376660] [2020-10-14 17:46:17,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:46:17,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:46:17,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:46:17,885 INFO L87 Difference]: Start difference. First operand 154 states and 189 transitions. Second operand 15 states. [2020-10-14 17:46:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:18,568 INFO L93 Difference]: Finished difference Result 392 states and 492 transitions. [2020-10-14 17:46:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:46:18,569 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-14 17:46:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:18,571 INFO L225 Difference]: With dead ends: 392 [2020-10-14 17:46:18,571 INFO L226 Difference]: Without dead ends: 263 [2020-10-14 17:46:18,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:46:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-14 17:46:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 158. [2020-10-14 17:46:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-14 17:46:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 193 transitions. [2020-10-14 17:46:18,604 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 193 transitions. Word has length 57 [2020-10-14 17:46:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:18,605 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 193 transitions. [2020-10-14 17:46:18,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:46:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 193 transitions. [2020-10-14 17:46:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 17:46:18,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:18,606 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:18,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:46:18,607 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:18,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:18,607 INFO L82 PathProgramCache]: Analyzing trace with hash 729857329, now seen corresponding path program 24 times [2020-10-14 17:46:18,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:18,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126357301] [2020-10-14 17:46:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:18,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:18,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:18,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:18,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:18,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:18,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:18,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:22,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:22,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 17:46:22,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:46:22,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3926 [2020-10-14 17:46:22,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:22,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:22,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:46:22,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:22,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:46:22,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:22,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:22,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:22,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:22,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:22,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:22,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:22,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:22,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:22,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:22,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:22,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:46:22,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126357301] [2020-10-14 17:46:22,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:22,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:46:22,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246949950] [2020-10-14 17:46:22,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:46:22,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:22,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:46:22,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:46:22,654 INFO L87 Difference]: Start difference. First operand 158 states and 193 transitions. Second operand 13 states. [2020-10-14 17:46:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:23,181 INFO L93 Difference]: Finished difference Result 250 states and 302 transitions. [2020-10-14 17:46:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:46:23,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-14 17:46:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:23,183 INFO L225 Difference]: With dead ends: 250 [2020-10-14 17:46:23,183 INFO L226 Difference]: Without dead ends: 232 [2020-10-14 17:46:23,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:46:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-14 17:46:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2020-10-14 17:46:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 17:46:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 195 transitions. [2020-10-14 17:46:23,209 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 195 transitions. Word has length 59 [2020-10-14 17:46:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:23,210 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 195 transitions. [2020-10-14 17:46:23,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:46:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 195 transitions. [2020-10-14 17:46:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 17:46:23,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:23,211 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:23,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:46:23,211 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:23,212 INFO L82 PathProgramCache]: Analyzing trace with hash -192912712, now seen corresponding path program 25 times [2020-10-14 17:46:23,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:23,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283077437] [2020-10-14 17:46:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:23,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:23,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:24,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:24,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:24,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:25,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:26,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:26,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:26,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:28,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 17:46:28,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 17:46:28,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-14 17:46:28,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:28,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:46:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 17:46:28,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:28,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:28,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:28,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:28,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:28,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:28,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:28,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:28,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:28,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:28,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:28,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:46:28,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283077437] [2020-10-14 17:46:28,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:28,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:46:28,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292665715] [2020-10-14 17:46:28,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:46:28,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:28,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:46:28,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:46:28,387 INFO L87 Difference]: Start difference. First operand 160 states and 195 transitions. Second operand 14 states. [2020-10-14 17:46:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:28,933 INFO L93 Difference]: Finished difference Result 269 states and 325 transitions. [2020-10-14 17:46:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:46:28,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-14 17:46:28,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:28,938 INFO L225 Difference]: With dead ends: 269 [2020-10-14 17:46:28,939 INFO L226 Difference]: Without dead ends: 258 [2020-10-14 17:46:28,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=660, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:46:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-14 17:46:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 160. [2020-10-14 17:46:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 17:46:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 195 transitions. [2020-10-14 17:46:28,967 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 195 transitions. Word has length 60 [2020-10-14 17:46:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:28,967 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 195 transitions. [2020-10-14 17:46:28,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:46:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 195 transitions. [2020-10-14 17:46:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 17:46:28,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:28,969 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:28,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:46:28,969 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:28,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:28,969 INFO L82 PathProgramCache]: Analyzing trace with hash -639583982, now seen corresponding path program 26 times [2020-10-14 17:46:28,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:28,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337820998] [2020-10-14 17:46:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:28,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:30,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:30,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:31,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:32,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:32,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:33,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:33,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:33,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 17:46:33,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:46:33,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:46:33,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:33,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:33,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:46:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 17:46:33,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:46:34,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:34,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:34,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:34,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:34,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:34,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:34,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:34,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:34,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:34,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:34,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:46:34,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337820998] [2020-10-14 17:46:34,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:34,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:46:34,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682122383] [2020-10-14 17:46:34,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:46:34,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:34,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:46:34,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:46:34,119 INFO L87 Difference]: Start difference. First operand 160 states and 195 transitions. Second operand 15 states. [2020-10-14 17:46:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:34,739 INFO L93 Difference]: Finished difference Result 286 states and 350 transitions. [2020-10-14 17:46:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:46:34,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-14 17:46:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:34,741 INFO L225 Difference]: With dead ends: 286 [2020-10-14 17:46:34,742 INFO L226 Difference]: Without dead ends: 275 [2020-10-14 17:46:34,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=792, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:46:34,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-14 17:46:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 160. [2020-10-14 17:46:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 17:46:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 195 transitions. [2020-10-14 17:46:34,772 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 195 transitions. Word has length 60 [2020-10-14 17:46:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:34,772 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 195 transitions. [2020-10-14 17:46:34,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:46:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 195 transitions. [2020-10-14 17:46:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 17:46:34,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:34,774 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:34,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 17:46:34,774 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1709166500, now seen corresponding path program 27 times [2020-10-14 17:46:34,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:34,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403545727] [2020-10-14 17:46:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:34,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:34,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:34,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:34,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:34,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:34,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:34,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:34,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:38,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:38,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 17:46:38,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:46:38,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3597 [2020-10-14 17:46:38,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:38,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:46:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 17:46:38,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:38,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:38,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:38,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:38,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:38,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:38,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:46:38,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:38,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:38,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:46:38,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403545727] [2020-10-14 17:46:38,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:38,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:46:38,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901328770] [2020-10-14 17:46:38,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:46:38,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:46:38,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:46:38,494 INFO L87 Difference]: Start difference. First operand 160 states and 195 transitions. Second operand 13 states. [2020-10-14 17:46:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:39,005 INFO L93 Difference]: Finished difference Result 247 states and 299 transitions. [2020-10-14 17:46:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:46:39,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-14 17:46:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:39,007 INFO L225 Difference]: With dead ends: 247 [2020-10-14 17:46:39,008 INFO L226 Difference]: Without dead ends: 229 [2020-10-14 17:46:39,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:46:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-14 17:46:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-14 17:46:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-14 17:46:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2020-10-14 17:46:39,031 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 60 [2020-10-14 17:46:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:39,031 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2020-10-14 17:46:39,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:46:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2020-10-14 17:46:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 17:46:39,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:39,032 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:39,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 17:46:39,033 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1838680967, now seen corresponding path program 28 times [2020-10-14 17:46:39,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:39,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629500581] [2020-10-14 17:46:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:39,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:40,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:40,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:41,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:42,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:42,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:43,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:43,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:43,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:44,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:44,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 17:46:44,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:46:44,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 17:46:44,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:44,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:46:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:46:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:44,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:44,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:44,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:44,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:44,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:44,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:44,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:44,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:44,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:44,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:44,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:44,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:46:44,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629500581] [2020-10-14 17:46:44,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:44,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:46:44,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644164676] [2020-10-14 17:46:44,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:46:44,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:44,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:46:44,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:46:44,202 INFO L87 Difference]: Start difference. First operand 162 states and 197 transitions. Second operand 15 states. [2020-10-14 17:46:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:44,837 INFO L93 Difference]: Finished difference Result 295 states and 358 transitions. [2020-10-14 17:46:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:46:44,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-14 17:46:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:44,839 INFO L225 Difference]: With dead ends: 295 [2020-10-14 17:46:44,839 INFO L226 Difference]: Without dead ends: 284 [2020-10-14 17:46:44,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:46:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-14 17:46:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-14 17:46:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-14 17:46:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2020-10-14 17:46:44,872 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 61 [2020-10-14 17:46:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:44,873 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2020-10-14 17:46:44,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:46:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2020-10-14 17:46:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 17:46:44,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:44,874 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:44,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 17:46:44,874 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1674683617, now seen corresponding path program 29 times [2020-10-14 17:46:44,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:44,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373948001] [2020-10-14 17:46:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:44,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:44,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:46,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:47,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:47,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:48,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:49,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:49,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:49,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:49,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 17:46:49,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:46:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 17:46:49,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:49,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:46:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:49,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:46:49,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:50,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:50,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:50,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:50,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:50,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:50,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:50,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:50,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:46:50,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373948001] [2020-10-14 17:46:50,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:50,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:46:50,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561278211] [2020-10-14 17:46:50,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:46:50,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:46:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:46:50,084 INFO L87 Difference]: Start difference. First operand 162 states and 197 transitions. Second operand 16 states. [2020-10-14 17:46:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:50,789 INFO L93 Difference]: Finished difference Result 426 states and 532 transitions. [2020-10-14 17:46:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:46:50,790 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-14 17:46:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:50,792 INFO L225 Difference]: With dead ends: 426 [2020-10-14 17:46:50,792 INFO L226 Difference]: Without dead ends: 291 [2020-10-14 17:46:50,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:46:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-14 17:46:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 166. [2020-10-14 17:46:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-14 17:46:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 201 transitions. [2020-10-14 17:46:50,831 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 201 transitions. Word has length 61 [2020-10-14 17:46:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:50,832 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 201 transitions. [2020-10-14 17:46:50,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:46:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 201 transitions. [2020-10-14 17:46:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 17:46:50,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:50,833 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:50,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 17:46:50,834 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:50,835 INFO L82 PathProgramCache]: Analyzing trace with hash 738753779, now seen corresponding path program 6 times [2020-10-14 17:46:50,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:50,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187078115] [2020-10-14 17:46:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:51,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:55,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:55,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 17:46:55,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:46:55,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4708 [2020-10-14 17:46:55,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:55,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:46:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:46:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:46:55,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:55,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:55,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:55,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:55,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:55,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:55,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:55,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:55,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:55,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:55,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:55,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 17:46:55,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187078115] [2020-10-14 17:46:55,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:55,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:46:55,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600427226] [2020-10-14 17:46:55,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:46:55,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:46:55,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:46:55,662 INFO L87 Difference]: Start difference. First operand 166 states and 201 transitions. Second operand 13 states. [2020-10-14 17:46:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:56,161 INFO L93 Difference]: Finished difference Result 250 states and 305 transitions. [2020-10-14 17:46:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:46:56,162 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-10-14 17:46:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:56,163 INFO L225 Difference]: With dead ends: 250 [2020-10-14 17:46:56,164 INFO L226 Difference]: Without dead ends: 232 [2020-10-14 17:46:56,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:46:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-14 17:46:56,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 179. [2020-10-14 17:46:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 17:46:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 218 transitions. [2020-10-14 17:46:56,201 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 218 transitions. Word has length 63 [2020-10-14 17:46:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:56,201 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 218 transitions. [2020-10-14 17:46:56,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:46:56,201 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 218 transitions. [2020-10-14 17:46:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 17:46:56,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:56,202 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:56,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 17:46:56,202 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:56,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1079390899, now seen corresponding path program 30 times [2020-10-14 17:46:56,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:56,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532021272] [2020-10-14 17:46:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:56,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:56,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:56,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:56,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:56,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:56,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:01,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:01,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 17:47:01,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:47:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:47:01,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:01,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:47:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:47:01,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:01,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:01,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:01,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:01,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:01,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:01,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:01,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:01,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:01,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 17:47:01,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532021272] [2020-10-14 17:47:01,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:01,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:47:01,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322450882] [2020-10-14 17:47:01,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:47:01,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:01,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:47:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:47:01,340 INFO L87 Difference]: Start difference. First operand 179 states and 218 transitions. Second operand 14 states. [2020-10-14 17:47:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:01,917 INFO L93 Difference]: Finished difference Result 282 states and 338 transitions. [2020-10-14 17:47:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:47:01,917 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-14 17:47:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:01,920 INFO L225 Difference]: With dead ends: 282 [2020-10-14 17:47:01,920 INFO L226 Difference]: Without dead ends: 264 [2020-10-14 17:47:01,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:47:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-14 17:47:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 173. [2020-10-14 17:47:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 17:47:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 212 transitions. [2020-10-14 17:47:01,948 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 212 transitions. Word has length 63 [2020-10-14 17:47:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:01,949 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 212 transitions. [2020-10-14 17:47:01,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:47:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 212 transitions. [2020-10-14 17:47:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 17:47:01,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:01,950 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:01,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 17:47:01,950 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash -690869224, now seen corresponding path program 31 times [2020-10-14 17:47:01,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:01,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035403222] [2020-10-14 17:47:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:01,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:01,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:03,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:03,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:03,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:04,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:04,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:05,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:05,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:05,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:05,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:06,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:06,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:07,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:07,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 17:47:07,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 17:47:07,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-14 17:47:07,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:07,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:47:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 17:47:07,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:07,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:07,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:07,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:07,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:07,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:07,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:07,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:07,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:07,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:07,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:07,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:07,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 17:47:07,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035403222] [2020-10-14 17:47:07,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:07,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:47:07,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918125946] [2020-10-14 17:47:07,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:47:07,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:07,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:47:07,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:47:07,151 INFO L87 Difference]: Start difference. First operand 173 states and 212 transitions. Second operand 15 states. [2020-10-14 17:47:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:07,835 INFO L93 Difference]: Finished difference Result 296 states and 358 transitions. [2020-10-14 17:47:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:47:07,836 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-14 17:47:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:07,838 INFO L225 Difference]: With dead ends: 296 [2020-10-14 17:47:07,838 INFO L226 Difference]: Without dead ends: 285 [2020-10-14 17:47:07,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:47:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-14 17:47:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 173. [2020-10-14 17:47:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 17:47:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 212 transitions. [2020-10-14 17:47:07,866 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 212 transitions. Word has length 64 [2020-10-14 17:47:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:07,866 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 212 transitions. [2020-10-14 17:47:07,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:47:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 212 transitions. [2020-10-14 17:47:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 17:47:07,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:07,867 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:07,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 17:47:07,867 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:07,868 INFO L82 PathProgramCache]: Analyzing trace with hash -445230094, now seen corresponding path program 32 times [2020-10-14 17:47:07,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:07,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235679256] [2020-10-14 17:47:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:07,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:09,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:09,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:10,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:11,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:12,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:12,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:12,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:12,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 17:47:12,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:47:12,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:47:12,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:12,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:47:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 17:47:12,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:47:13,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:13,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:13,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:13,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:13,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:13,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:13,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:13,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:13,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 17:47:13,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235679256] [2020-10-14 17:47:13,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:13,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:47:13,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432762014] [2020-10-14 17:47:13,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:47:13,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:13,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:47:13,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:47:13,044 INFO L87 Difference]: Start difference. First operand 173 states and 212 transitions. Second operand 16 states. [2020-10-14 17:47:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:13,824 INFO L93 Difference]: Finished difference Result 309 states and 379 transitions. [2020-10-14 17:47:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:47:13,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-14 17:47:13,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:13,827 INFO L225 Difference]: With dead ends: 309 [2020-10-14 17:47:13,827 INFO L226 Difference]: Without dead ends: 298 [2020-10-14 17:47:13,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:47:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-14 17:47:13,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 173. [2020-10-14 17:47:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 17:47:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 212 transitions. [2020-10-14 17:47:13,857 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 212 transitions. Word has length 64 [2020-10-14 17:47:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:13,858 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 212 transitions. [2020-10-14 17:47:13,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:47:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 212 transitions. [2020-10-14 17:47:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 17:47:13,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:13,858 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:13,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 17:47:13,859 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1816846148, now seen corresponding path program 33 times [2020-10-14 17:47:13,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:13,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968688184] [2020-10-14 17:47:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:13,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:13,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:13,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:13,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:13,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:13,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:14,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:18,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:18,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 17:47:18,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:47:18,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:47:18,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:18,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:47:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 17:47:18,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:18,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:18,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:18,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:18,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:18,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:18,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:18,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:18,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:18,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:18,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:18,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 17:47:18,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968688184] [2020-10-14 17:47:18,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:18,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:47:18,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133220563] [2020-10-14 17:47:19,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:47:19,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:47:19,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:47:19,001 INFO L87 Difference]: Start difference. First operand 173 states and 212 transitions. Second operand 14 states. [2020-10-14 17:47:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:19,561 INFO L93 Difference]: Finished difference Result 274 states and 331 transitions. [2020-10-14 17:47:19,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:47:19,561 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-14 17:47:19,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:19,564 INFO L225 Difference]: With dead ends: 274 [2020-10-14 17:47:19,564 INFO L226 Difference]: Without dead ends: 256 [2020-10-14 17:47:19,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:47:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-14 17:47:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 175. [2020-10-14 17:47:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-14 17:47:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 214 transitions. [2020-10-14 17:47:19,594 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 214 transitions. Word has length 64 [2020-10-14 17:47:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:19,594 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 214 transitions. [2020-10-14 17:47:19,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:47:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 214 transitions. [2020-10-14 17:47:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 17:47:19,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:19,595 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:19,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 17:47:19,595 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash -481925047, now seen corresponding path program 34 times [2020-10-14 17:47:19,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:19,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393395465] [2020-10-14 17:47:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:19,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:19,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:21,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:21,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:21,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:21,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:22,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:22,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:22,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:22,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:23,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:23,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:23,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:24,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:24,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:24,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:24,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:24,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 17:47:24,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 17:47:24,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:47:24,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:24,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:24,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:47:24,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:24,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:47:24,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:24,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:24,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:24,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:24,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:24,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:24,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:24,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:24,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:24,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:24,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:24,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:24,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 17:47:24,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393395465] [2020-10-14 17:47:24,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:24,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:47:24,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500835533] [2020-10-14 17:47:24,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:47:24,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:24,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:47:24,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:47:24,758 INFO L87 Difference]: Start difference. First operand 175 states and 214 transitions. Second operand 15 states. [2020-10-14 17:47:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:25,454 INFO L93 Difference]: Finished difference Result 297 states and 358 transitions. [2020-10-14 17:47:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:47:25,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-14 17:47:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:25,456 INFO L225 Difference]: With dead ends: 297 [2020-10-14 17:47:25,456 INFO L226 Difference]: Without dead ends: 286 [2020-10-14 17:47:25,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:47:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-14 17:47:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 175. [2020-10-14 17:47:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-14 17:47:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 214 transitions. [2020-10-14 17:47:25,486 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 214 transitions. Word has length 65 [2020-10-14 17:47:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:25,487 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 214 transitions. [2020-10-14 17:47:25,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:47:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 214 transitions. [2020-10-14 17:47:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 17:47:25,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:25,488 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:25,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 17:47:25,488 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash -928596317, now seen corresponding path program 35 times [2020-10-14 17:47:25,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:25,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253412955] [2020-10-14 17:47:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:25,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:25,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:27,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:28,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:28,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:28,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:29,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:29,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:30,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:30,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:30,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 17:47:30,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:47:30,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:47:30,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:30,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:30,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:47:30,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:30,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:47:30,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:30,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:30,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:30,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:30,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:30,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:30,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:30,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 17:47:30,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253412955] [2020-10-14 17:47:30,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:30,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:47:30,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593714407] [2020-10-14 17:47:30,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:47:30,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:47:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:47:30,681 INFO L87 Difference]: Start difference. First operand 175 states and 214 transitions. Second operand 16 states. [2020-10-14 17:47:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:31,494 INFO L93 Difference]: Finished difference Result 320 states and 389 transitions. [2020-10-14 17:47:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:47:31,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-14 17:47:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:31,497 INFO L225 Difference]: With dead ends: 320 [2020-10-14 17:47:31,497 INFO L226 Difference]: Without dead ends: 309 [2020-10-14 17:47:31,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:47:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-14 17:47:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 175. [2020-10-14 17:47:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-14 17:47:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 214 transitions. [2020-10-14 17:47:31,529 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 214 transitions. Word has length 65 [2020-10-14 17:47:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:31,529 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 214 transitions. [2020-10-14 17:47:31,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:47:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 214 transitions. [2020-10-14 17:47:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 17:47:31,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:31,531 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:31,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 17:47:31,531 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash 383740285, now seen corresponding path program 36 times [2020-10-14 17:47:31,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:31,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507477353] [2020-10-14 17:47:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:31,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:31,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:33,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:34,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:35,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:36,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:36,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 17:47:36,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:47:36,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:47:36,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:36,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:36,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:47:36,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:36,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:47:36,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:36,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:36,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:36,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:36,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:36,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:36,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:36,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:36,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:36,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:36,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 17:47:36,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507477353] [2020-10-14 17:47:36,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:36,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:47:36,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705409407] [2020-10-14 17:47:36,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:47:36,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:47:36,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:47:36,735 INFO L87 Difference]: Start difference. First operand 175 states and 214 transitions. Second operand 17 states. [2020-10-14 17:47:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:37,527 INFO L93 Difference]: Finished difference Result 458 states and 574 transitions. [2020-10-14 17:47:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:47:37,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-10-14 17:47:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:37,530 INFO L225 Difference]: With dead ends: 458 [2020-10-14 17:47:37,530 INFO L226 Difference]: Without dead ends: 312 [2020-10-14 17:47:37,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:47:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-14 17:47:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 179. [2020-10-14 17:47:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 17:47:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 218 transitions. [2020-10-14 17:47:37,565 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 218 transitions. Word has length 65 [2020-10-14 17:47:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:37,565 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 218 transitions. [2020-10-14 17:47:37,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:47:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 218 transitions. [2020-10-14 17:47:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 17:47:37,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:37,566 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:37,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 17:47:37,566 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:37,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1144371825, now seen corresponding path program 37 times [2020-10-14 17:47:37,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:37,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292136101] [2020-10-14 17:47:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:37,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:37,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:37,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:37,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:37,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:37,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:37,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:37,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:42,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 17:47:42,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:47:42,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:47:42,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:42,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:42,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:47:42,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:42,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:47:42,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:42,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:42,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:42,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:42,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:42,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:42,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:42,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:42,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:42,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:47:42,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292136101] [2020-10-14 17:47:42,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:42,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:47:42,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438272221] [2020-10-14 17:47:42,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:47:42,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:42,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:47:42,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:47:42,726 INFO L87 Difference]: Start difference. First operand 179 states and 218 transitions. Second operand 14 states. [2020-10-14 17:47:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:43,276 INFO L93 Difference]: Finished difference Result 273 states and 330 transitions. [2020-10-14 17:47:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:47:43,277 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-14 17:47:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:43,278 INFO L225 Difference]: With dead ends: 273 [2020-10-14 17:47:43,279 INFO L226 Difference]: Without dead ends: 255 [2020-10-14 17:47:43,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:47:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-14 17:47:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 181. [2020-10-14 17:47:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 17:47:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2020-10-14 17:47:43,312 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 67 [2020-10-14 17:47:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:43,312 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2020-10-14 17:47:43,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:47:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2020-10-14 17:47:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 17:47:43,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:43,313 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:43,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 17:47:43,313 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1048681592, now seen corresponding path program 38 times [2020-10-14 17:47:43,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:43,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613627345] [2020-10-14 17:47:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:43,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:43,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:45,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:45,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:45,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:48,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 17:47:48,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:47:48,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 17:47:48,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:48,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:48,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:47:48,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:48,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 17:47:48,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:48,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:48,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:48,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:48,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:48,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:48,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:48,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:48,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:47:48,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613627345] [2020-10-14 17:47:48,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:48,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:47:48,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876498939] [2020-10-14 17:47:48,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:47:48,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:48,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:47:48,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:47:48,495 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand 16 states. [2020-10-14 17:47:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:49,212 INFO L93 Difference]: Finished difference Result 330 states and 398 transitions. [2020-10-14 17:47:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:47:49,212 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-14 17:47:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:49,216 INFO L225 Difference]: With dead ends: 330 [2020-10-14 17:47:49,217 INFO L226 Difference]: Without dead ends: 319 [2020-10-14 17:47:49,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:47:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-14 17:47:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 181. [2020-10-14 17:47:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 17:47:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2020-10-14 17:47:49,280 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 68 [2020-10-14 17:47:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:49,280 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2020-10-14 17:47:49,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:47:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2020-10-14 17:47:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 17:47:49,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:49,282 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:49,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 17:47:49,282 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:49,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:49,283 INFO L82 PathProgramCache]: Analyzing trace with hash 884684242, now seen corresponding path program 39 times [2020-10-14 17:47:49,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:49,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942792024] [2020-10-14 17:47:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:49,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:49,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:52,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:52,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:53,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:53,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:54,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:54,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 17:47:54,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:47:54,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 17:47:54,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:54,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:54,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:47:54,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:54,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 17:47:54,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:54,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:54,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:54,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:54,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:54,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:54,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:54,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:54,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:54,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:54,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:54,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:54,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:47:54,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942792024] [2020-10-14 17:47:54,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:54,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:47:54,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150284211] [2020-10-14 17:47:54,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:47:54,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:47:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:47:54,494 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand 17 states. [2020-10-14 17:47:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:55,346 INFO L93 Difference]: Finished difference Result 339 states and 415 transitions. [2020-10-14 17:47:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:47:55,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-14 17:47:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:55,348 INFO L225 Difference]: With dead ends: 339 [2020-10-14 17:47:55,348 INFO L226 Difference]: Without dead ends: 328 [2020-10-14 17:47:55,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:47:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-14 17:47:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 181. [2020-10-14 17:47:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 17:47:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2020-10-14 17:47:55,389 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 68 [2020-10-14 17:47:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:55,389 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2020-10-14 17:47:55,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:47:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2020-10-14 17:47:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 17:47:55,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:55,390 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:55,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 17:47:55,390 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:55,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1160206398, now seen corresponding path program 7 times [2020-10-14 17:47:55,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:55,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005894206] [2020-10-14 17:47:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:00,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:00,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 17:48:00,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:48:00,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:48:00,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:00,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:00,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:48:00,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:00,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 17:48:00,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:00,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:00,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:00,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:00,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:00,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:00,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:00,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:00,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:00,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:00,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:48:00,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005894206] [2020-10-14 17:48:00,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:00,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:48:00,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923594379] [2020-10-14 17:48:00,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:48:00,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:48:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:48:00,524 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand 14 states. [2020-10-14 17:48:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:01,098 INFO L93 Difference]: Finished difference Result 270 states and 330 transitions. [2020-10-14 17:48:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:48:01,099 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-14 17:48:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:01,100 INFO L225 Difference]: With dead ends: 270 [2020-10-14 17:48:01,100 INFO L226 Difference]: Without dead ends: 252 [2020-10-14 17:48:01,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:48:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-14 17:48:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 194. [2020-10-14 17:48:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-14 17:48:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 237 transitions. [2020-10-14 17:48:01,136 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 237 transitions. Word has length 68 [2020-10-14 17:48:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:01,137 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 237 transitions. [2020-10-14 17:48:01,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:48:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 237 transitions. [2020-10-14 17:48:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 17:48:01,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:01,138 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:01,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 17:48:01,138 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:01,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:01,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1316616220, now seen corresponding path program 40 times [2020-10-14 17:48:01,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:01,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831119117] [2020-10-14 17:48:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:06,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 17:48:06,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:48:06,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:48:06,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:06,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:06,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:48:06,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:06,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 17:48:06,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:06,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:06,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:06,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:06,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:06,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:06,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:06,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:06,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:06,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:06,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:06,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:48:06,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831119117] [2020-10-14 17:48:06,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:06,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:48:06,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927623999] [2020-10-14 17:48:06,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:48:06,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:48:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:48:06,291 INFO L87 Difference]: Start difference. First operand 194 states and 237 transitions. Second operand 15 states. [2020-10-14 17:48:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:06,990 INFO L93 Difference]: Finished difference Result 308 states and 369 transitions. [2020-10-14 17:48:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:48:06,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-10-14 17:48:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:06,993 INFO L225 Difference]: With dead ends: 308 [2020-10-14 17:48:06,993 INFO L226 Difference]: Without dead ends: 290 [2020-10-14 17:48:06,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:48:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-14 17:48:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 188. [2020-10-14 17:48:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-14 17:48:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 231 transitions. [2020-10-14 17:48:07,039 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 231 transitions. Word has length 68 [2020-10-14 17:48:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:07,039 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 231 transitions. [2020-10-14 17:48:07,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:48:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 231 transitions. [2020-10-14 17:48:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 17:48:07,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:07,041 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:07,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 17:48:07,041 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash 248927205, now seen corresponding path program 41 times [2020-10-14 17:48:07,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:07,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507163563] [2020-10-14 17:48:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:07,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:07,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:09,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:09,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:09,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:10,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:10,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:10,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:11,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:11,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:12,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 17:48:12,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 17:48:12,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-14 17:48:12,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:12,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:48:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:12,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:48:12,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:12,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:12,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:12,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:12,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:12,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:12,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:12,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:12,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:48:12,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507163563] [2020-10-14 17:48:12,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:12,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:48:12,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862584150] [2020-10-14 17:48:12,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:48:12,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:12,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:48:12,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:48:12,295 INFO L87 Difference]: Start difference. First operand 188 states and 231 transitions. Second operand 16 states. [2020-10-14 17:48:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:13,077 INFO L93 Difference]: Finished difference Result 326 states and 393 transitions. [2020-10-14 17:48:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:48:13,078 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-14 17:48:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:13,080 INFO L225 Difference]: With dead ends: 326 [2020-10-14 17:48:13,080 INFO L226 Difference]: Without dead ends: 315 [2020-10-14 17:48:13,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:48:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-14 17:48:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 188. [2020-10-14 17:48:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-14 17:48:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 231 transitions. [2020-10-14 17:48:13,120 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 231 transitions. Word has length 69 [2020-10-14 17:48:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:13,121 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 231 transitions. [2020-10-14 17:48:13,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:48:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 231 transitions. [2020-10-14 17:48:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 17:48:13,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:13,122 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:13,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 17:48:13,122 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash 494566335, now seen corresponding path program 42 times [2020-10-14 17:48:13,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:13,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724640298] [2020-10-14 17:48:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:13,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:13,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:15,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:15,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:16,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:16,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:18,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:18,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 17:48:18,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:48:18,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:48:18,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:18,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:48:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:48:18,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:18,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:18,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:18,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:18,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:18,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:18,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:18,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:18,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:18,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:18,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:18,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:18,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:48:18,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724640298] [2020-10-14 17:48:18,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:18,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:48:18,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841893683] [2020-10-14 17:48:18,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:48:18,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:18,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:48:18,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:48:18,319 INFO L87 Difference]: Start difference. First operand 188 states and 231 transitions. Second operand 17 states. [2020-10-14 17:48:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:19,186 INFO L93 Difference]: Finished difference Result 345 states and 420 transitions. [2020-10-14 17:48:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:48:19,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-14 17:48:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:19,189 INFO L225 Difference]: With dead ends: 345 [2020-10-14 17:48:19,189 INFO L226 Difference]: Without dead ends: 334 [2020-10-14 17:48:19,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:48:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-14 17:48:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 188. [2020-10-14 17:48:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-14 17:48:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 231 transitions. [2020-10-14 17:48:19,232 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 231 transitions. Word has length 69 [2020-10-14 17:48:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:19,233 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 231 transitions. [2020-10-14 17:48:19,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:48:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 231 transitions. [2020-10-14 17:48:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 17:48:19,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:19,234 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:19,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 17:48:19,234 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1070344167, now seen corresponding path program 43 times [2020-10-14 17:48:19,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:19,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406123144] [2020-10-14 17:48:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:19,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:19,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:22,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:23,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:24,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 17:48:24,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:48:24,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:48:24,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:24,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:48:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:48:24,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:24,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:24,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:24,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:24,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:24,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:24,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:24,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:24,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:48:24,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406123144] [2020-10-14 17:48:24,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:24,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:48:24,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719369504] [2020-10-14 17:48:24,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:48:24,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:24,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:48:24,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:48:24,442 INFO L87 Difference]: Start difference. First operand 188 states and 231 transitions. Second operand 18 states. [2020-10-14 17:48:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:25,338 INFO L93 Difference]: Finished difference Result 493 states and 620 transitions. [2020-10-14 17:48:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:48:25,339 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-10-14 17:48:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:25,341 INFO L225 Difference]: With dead ends: 493 [2020-10-14 17:48:25,341 INFO L226 Difference]: Without dead ends: 336 [2020-10-14 17:48:25,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=558, Invalid=1082, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:48:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-14 17:48:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 192. [2020-10-14 17:48:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-14 17:48:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 235 transitions. [2020-10-14 17:48:25,382 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 235 transitions. Word has length 69 [2020-10-14 17:48:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:25,382 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 235 transitions. [2020-10-14 17:48:25,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:48:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 235 transitions. [2020-10-14 17:48:25,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 17:48:25,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:25,384 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:25,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 17:48:25,384 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:25,384 INFO L82 PathProgramCache]: Analyzing trace with hash -787646421, now seen corresponding path program 44 times [2020-10-14 17:48:25,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:25,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145178811] [2020-10-14 17:48:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking...