/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:24:54,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:24:54,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:24:54,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:24:54,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:24:54,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:24:54,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:24:54,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:24:54,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:24:54,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:24:54,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:24:54,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:24:54,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:24:54,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:24:54,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:24:54,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:24:54,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:24:54,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:24:54,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:24:54,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:24:54,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:24:54,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:24:54,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:24:54,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:24:54,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:24:54,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:24:54,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:24:54,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:24:54,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:24:54,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:24:54,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:24:54,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:24:54,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:24:54,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:24:54,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:24:54,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:24:54,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:24:54,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:24:54,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:24:54,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:24:54,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:24:54,213 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 05:24:54,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:24:54,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:24:54,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:24:54,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:24:54,259 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:24:54,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:24:54,260 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:24:54,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:24:54,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:24:54,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:24:54,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:24:54,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:24:54,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:24:54,262 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:24:54,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:24:54,262 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:24:54,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:24:54,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:24:54,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:24:54,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:24:54,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:24:54,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:24:54,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:24:54,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:24:54,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:24:54,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:24:54,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:24:54,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:24:54,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:24:54,265 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:24:54,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:24:54,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:24:54,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:24:54,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:24:54,594 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:24:54,595 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-14 05:24:54,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f47bb2579/41d79399a1bb42be812c9be36dd4ddc5/FLAG58f0f4d06 [2020-10-14 05:24:55,081 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:24:55,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-14 05:24:55,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f47bb2579/41d79399a1bb42be812c9be36dd4ddc5/FLAG58f0f4d06 [2020-10-14 05:24:55,449 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f47bb2579/41d79399a1bb42be812c9be36dd4ddc5 [2020-10-14 05:24:55,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:24:55,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:24:55,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:24:55,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:24:55,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:24:55,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:24:55" (1/1) ... [2020-10-14 05:24:55,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a78814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55, skipping insertion in model container [2020-10-14 05:24:55,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:24:55" (1/1) ... [2020-10-14 05:24:55,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:24:55,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:24:55,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:24:55,692 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:24:55,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:24:55,721 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:24:55,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55 WrapperNode [2020-10-14 05:24:55,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:24:55,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:24:55,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:24:55,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:24:55,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55" (1/1) ... [2020-10-14 05:24:55,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55" (1/1) ... [2020-10-14 05:24:55,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55" (1/1) ... [2020-10-14 05:24:55,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55" (1/1) ... [2020-10-14 05:24:55,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55" (1/1) ... [2020-10-14 05:24:55,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55" (1/1) ... [2020-10-14 05:24:55,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55" (1/1) ... [2020-10-14 05:24:55,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:24:55,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:24:55,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:24:55,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:24:55,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55" (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 05:24:55,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:24:55,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:24:55,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:24:55,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:24:55,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:24:55,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:24:55,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:24:55,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:24:55,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:24:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:24:56,152 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:24:56,153 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 05:24:56,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:24:56 BoogieIcfgContainer [2020-10-14 05:24:56,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:24:56,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:24:56,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:24:56,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:24:56,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:24:55" (1/3) ... [2020-10-14 05:24:56,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d81b60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:24:56, skipping insertion in model container [2020-10-14 05:24:56,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:55" (2/3) ... [2020-10-14 05:24:56,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d81b60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:24:56, skipping insertion in model container [2020-10-14 05:24:56,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:24:56" (3/3) ... [2020-10-14 05:24:56,169 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de52.c [2020-10-14 05:24:56,179 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:24:56,187 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:24:56,201 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:24:56,245 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:24:56,245 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:24:56,245 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:24:56,245 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:24:56,246 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:24:56,246 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:24:56,246 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:24:56,246 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:24:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-14 05:24:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:24:56,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:56,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:56,300 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:56,307 INFO L82 PathProgramCache]: Analyzing trace with hash -255424134, now seen corresponding path program 1 times [2020-10-14 05:24:56,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:56,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406430322] [2020-10-14 05:24:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:24:56,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:24:56,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-14 05:24:56,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:56,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:24:56,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:56,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:24:56,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:56,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:56,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:24:56,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:56,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:56,800 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 05:24:56,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406430322] [2020-10-14 05:24:56,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:56,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:24:56,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448241829] [2020-10-14 05:24:56,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:24:56,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:56,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:24:56,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:24:56,832 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-10-14 05:24:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:56,865 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2020-10-14 05:24:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:24:56,867 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-10-14 05:24:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:56,881 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:24:56,882 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:24:56,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:24:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:24:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 05:24:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:24:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-10-14 05:24:56,940 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2020-10-14 05:24:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:56,941 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-10-14 05:24:56,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:24:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-10-14 05:24:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:24:56,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:56,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:56,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:24:56,943 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:56,944 INFO L82 PathProgramCache]: Analyzing trace with hash -369940738, now seen corresponding path program 1 times [2020-10-14 05:24:56,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:56,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968943331] [2020-10-14 05:24:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:24:57,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:57,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-14 05:24:57,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:57,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:57,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:24:57,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:57,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:57,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:57,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:57,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,393 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 05:24:57,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968943331] [2020-10-14 05:24:57,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:57,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:24:57,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665231291] [2020-10-14 05:24:57,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:57,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:57,402 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 5 states. [2020-10-14 05:24:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:57,497 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2020-10-14 05:24:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:24:57,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 05:24:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:57,499 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:24:57,500 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:24:57,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:24:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:24:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:24:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-10-14 05:24:57,508 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2020-10-14 05:24:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:57,509 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-10-14 05:24:57,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-10-14 05:24:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:57,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:57,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:57,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:24:57,511 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1439862098, now seen corresponding path program 1 times [2020-10-14 05:24:57,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:57,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913305223] [2020-10-14 05:24:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:57,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:57,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-14 05:24:57,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:24:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:57,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:24:57,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:57,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:57,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:57,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:57,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:57,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:57,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:57,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913305223] [2020-10-14 05:24:57,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:57,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:24:57,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42625714] [2020-10-14 05:24:57,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:24:57,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:24:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:57,603 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 3 states. [2020-10-14 05:24:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:57,632 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-10-14 05:24:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:24:57,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 05:24:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:57,634 INFO L225 Difference]: With dead ends: 34 [2020-10-14 05:24:57,634 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:24:57,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:24:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 05:24:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:24:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-14 05:24:57,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2020-10-14 05:24:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:57,649 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-14 05:24:57,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:24:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-14 05:24:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:57,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:57,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:57,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:24:57,652 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:57,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1452276799, now seen corresponding path program 1 times [2020-10-14 05:24:57,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:57,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966587138] [2020-10-14 05:24:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:57,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:57,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-14 05:24:57,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:24:57,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:24:57,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:24:57,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:57,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:57,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:57,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:57,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:57,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:57,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:57,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966587138] [2020-10-14 05:24:57,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:57,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:24:57,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817338274] [2020-10-14 05:24:57,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:24:57,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:57,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:24:57,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:57,902 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-10-14 05:24:57,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:57,955 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2020-10-14 05:24:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:24:57,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 05:24:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:57,958 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:24:57,958 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:24:57,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:24:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 05:24:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:24:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-14 05:24:57,973 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 16 [2020-10-14 05:24:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:57,973 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-14 05:24:57,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:24:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-14 05:24:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:24:57,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:57,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:57,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:24:57,976 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash 879719134, now seen corresponding path program 1 times [2020-10-14 05:24:57,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:57,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217263360] [2020-10-14 05:24:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:24:58,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-14 05:24:58,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:24:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:58,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:58,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:58,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:58,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:58,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:58,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217263360] [2020-10-14 05:24:58,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:58,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:24:58,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758987763] [2020-10-14 05:24:58,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:58,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:58,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:58,128 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-14 05:24:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:58,193 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-10-14 05:24:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:58,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 05:24:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:58,195 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:24:58,195 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:24:58,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:58,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:24:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 05:24:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:24:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-10-14 05:24:58,202 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2020-10-14 05:24:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:58,202 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-10-14 05:24:58,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-10-14 05:24:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:24:58,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:58,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:58,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:24:58,204 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:58,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1333221619, now seen corresponding path program 1 times [2020-10-14 05:24:58,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:58,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035526764] [2020-10-14 05:24:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:24:58,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:58,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-14 05:24:58,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:58,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:24:58,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:24:58,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:58,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:58,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:58,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:58,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:58,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:58,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:58,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035526764] [2020-10-14 05:24:58,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:58,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:24:58,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8520138] [2020-10-14 05:24:58,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:58,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:58,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:58,392 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 5 states. [2020-10-14 05:24:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:58,460 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-14 05:24:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:24:58,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 05:24:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:58,464 INFO L225 Difference]: With dead ends: 36 [2020-10-14 05:24:58,464 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:24:58,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:24:58,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-14 05:24:58,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:24:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2020-10-14 05:24:58,472 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 18 [2020-10-14 05:24:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:58,472 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2020-10-14 05:24:58,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2020-10-14 05:24:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:24:58,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:58,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:58,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:24:58,474 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:58,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1698651309, now seen corresponding path program 1 times [2020-10-14 05:24:58,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:58,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860923942] [2020-10-14 05:24:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:24:58,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:58,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-14 05:24:58,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:58,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:58,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:24:58,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:58,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:58,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:58,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:58,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:58,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:24:58,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860923942] [2020-10-14 05:24:58,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:58,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:58,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995855114] [2020-10-14 05:24:58,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:58,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:58,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:58,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:58,668 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand 4 states. [2020-10-14 05:24:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:58,703 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-10-14 05:24:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:58,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-14 05:24:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:58,705 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:24:58,705 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:24:58,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 05:24:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:24:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 05:24:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:24:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2020-10-14 05:24:58,712 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 18 [2020-10-14 05:24:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:58,712 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2020-10-14 05:24:58,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2020-10-14 05:24:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:58,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:58,713 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:58,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:24:58,714 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:58,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:58,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1655340560, now seen corresponding path program 2 times [2020-10-14 05:24:58,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:58,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241861600] [2020-10-14 05:24:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:58,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:58,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-14 05:24:58,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:24:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:24:58,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:58,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:58,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:58,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:58,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:58,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:58,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:58,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241861600] [2020-10-14 05:24:58,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:58,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:58,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602787154] [2020-10-14 05:24:58,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:58,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:58,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:58,933 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand 4 states. [2020-10-14 05:24:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:58,967 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2020-10-14 05:24:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:58,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 05:24:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:58,968 INFO L225 Difference]: With dead ends: 48 [2020-10-14 05:24:58,969 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:24:58,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 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 05:24:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:24:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-14 05:24:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:24:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2020-10-14 05:24:58,975 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 19 [2020-10-14 05:24:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:58,975 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2020-10-14 05:24:58,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-10-14 05:24:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:58,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:58,977 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:58,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:24:58,977 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:58,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:58,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1691708464, now seen corresponding path program 3 times [2020-10-14 05:24:58,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:58,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321853311] [2020-10-14 05:24:58,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:59,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:24:59,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-14 05:24:59,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:24:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:59,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:59,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:59,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:59,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:59,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:59,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321853311] [2020-10-14 05:24:59,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:59,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:59,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032081233] [2020-10-14 05:24:59,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:59,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:59,456 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand 4 states. [2020-10-14 05:24:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:59,489 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2020-10-14 05:24:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:59,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 05:24:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:59,491 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:24:59,492 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:24:59,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 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 05:24:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:24:59,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-14 05:24:59,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:24:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2020-10-14 05:24:59,499 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 19 [2020-10-14 05:24:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:59,499 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2020-10-14 05:24:59,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2020-10-14 05:24:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:59,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:59,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:59,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:24:59,501 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash 652481311, now seen corresponding path program 1 times [2020-10-14 05:24:59,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:59,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146136057] [2020-10-14 05:24:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:59,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:59,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-14 05:24:59,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:59,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:59,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:24:59,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:59,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:59,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:59,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:59,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:59,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:59,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:59,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:24:59,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146136057] [2020-10-14 05:24:59,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:59,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:59,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187255052] [2020-10-14 05:24:59,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:59,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:59,597 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand 4 states. [2020-10-14 05:24:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:59,639 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2020-10-14 05:24:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:59,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 05:24:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:59,640 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:24:59,640 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:24:59,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 05:24:59,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:24:59,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-14 05:24:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:24:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2020-10-14 05:24:59,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 19 [2020-10-14 05:24:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:59,648 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2020-10-14 05:24:59,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2020-10-14 05:24:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:59,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:59,649 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:59,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:24:59,649 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:59,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1315744958, now seen corresponding path program 2 times [2020-10-14 05:24:59,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:59,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053654266] [2020-10-14 05:24:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:59,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:59,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-14 05:24:59,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:59,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:59,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:24:59,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:59,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:59,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:59,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:59,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:59,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:59,897 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 05:24:59,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053654266] [2020-10-14 05:24:59,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:59,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:24:59,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773161832] [2020-10-14 05:24:59,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:59,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:59,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:59,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:59,899 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand 5 states. [2020-10-14 05:24:59,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:59,956 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2020-10-14 05:24:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:24:59,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-14 05:24:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:59,957 INFO L225 Difference]: With dead ends: 71 [2020-10-14 05:24:59,958 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:24:59,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:24:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-10-14 05:24:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 05:24:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 75 transitions. [2020-10-14 05:24:59,966 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 75 transitions. Word has length 19 [2020-10-14 05:24:59,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:59,967 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 75 transitions. [2020-10-14 05:24:59,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2020-10-14 05:24:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:59,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:59,968 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 05:24:59,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:24:59,969 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash -674370641, now seen corresponding path program 1 times [2020-10-14 05:24:59,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:59,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685422980] [2020-10-14 05:24:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:00,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:25:00,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:00,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-14 05:25:00,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:00,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:25:00,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:00,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:00,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:00,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:00,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:00,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:00,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:00,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:00,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:00,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:00,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:25:00,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685422980] [2020-10-14 05:25:00,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:00,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:00,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435599280] [2020-10-14 05:25:00,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:00,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:00,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:00,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:00,778 INFO L87 Difference]: Start difference. First operand 53 states and 75 transitions. Second operand 7 states. [2020-10-14 05:25:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:00,869 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-10-14 05:25:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:00,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 05:25:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:00,871 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:25:00,871 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:25:00,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:25:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-14 05:25:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:25:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-10-14 05:25:00,879 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 20 [2020-10-14 05:25:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:00,879 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-10-14 05:25:00,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-10-14 05:25:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:25:00,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:00,881 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:00,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:25:00,881 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2079729997, now seen corresponding path program 2 times [2020-10-14 05:25:00,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:00,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439939006] [2020-10-14 05:25:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:00,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:01,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:25:01,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:01,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-14 05:25:01,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:01,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:01,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:02,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:02,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:02,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:02,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:02,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:02,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:02,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:25:02,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439939006] [2020-10-14 05:25:02,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:02,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:02,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710718430] [2020-10-14 05:25:02,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:02,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:02,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:02,009 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 5 states. [2020-10-14 05:25:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:02,064 INFO L93 Difference]: Finished difference Result 86 states and 124 transitions. [2020-10-14 05:25:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:02,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 05:25:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:02,065 INFO L225 Difference]: With dead ends: 86 [2020-10-14 05:25:02,065 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:25:02,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:25:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-14 05:25:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 05:25:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2020-10-14 05:25:02,073 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 20 [2020-10-14 05:25:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:02,074 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2020-10-14 05:25:02,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2020-10-14 05:25:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:25:02,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:02,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:02,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:25:02,076 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:02,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:02,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1588453825, now seen corresponding path program 4 times [2020-10-14 05:25:02,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:02,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097487768] [2020-10-14 05:25:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:02,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:02,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:25:02,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:02,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-14 05:25:02,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:02,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:02,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:25:02,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:02,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:25:02,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:02,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:02,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:02,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:02,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:02,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:02,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:02,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:02,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:02,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:02,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097487768] [2020-10-14 05:25:02,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:25:02,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:25:02,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760655713] [2020-10-14 05:25:02,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:02,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:02,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:02,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:02,588 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand 4 states. [2020-10-14 05:25:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:02,642 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2020-10-14 05:25:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:02,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-14 05:25:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:02,643 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:25:02,644 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:25:02,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:25:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-14 05:25:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:25:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2020-10-14 05:25:02,659 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 20 [2020-10-14 05:25:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:02,659 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2020-10-14 05:25:02,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2020-10-14 05:25:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:25:02,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:02,666 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:02,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:25:02,668 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:02,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:02,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1964417331, now seen corresponding path program 3 times [2020-10-14 05:25:02,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:02,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610125552] [2020-10-14 05:25:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:02,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:02,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:25:02,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:02,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-14 05:25:02,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:02,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:02,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:25:02,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:02,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:25:02,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:03,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:03,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:03,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:03,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:03,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:03,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:03,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:03,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:03,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:03,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 05:25:03,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610125552] [2020-10-14 05:25:03,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:03,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:25:03,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141246898] [2020-10-14 05:25:03,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:03,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:03,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:03,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:03,019 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 4 states. [2020-10-14 05:25:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:03,051 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2020-10-14 05:25:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:03,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-14 05:25:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:03,053 INFO L225 Difference]: With dead ends: 70 [2020-10-14 05:25:03,053 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:25:03,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 05:25:03,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:25:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2020-10-14 05:25:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:25:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2020-10-14 05:25:03,066 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 20 [2020-10-14 05:25:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:03,066 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2020-10-14 05:25:03,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2020-10-14 05:25:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:25:03,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:03,068 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:03,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:25:03,068 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:03,068 INFO L82 PathProgramCache]: Analyzing trace with hash -920200993, now seen corresponding path program 3 times [2020-10-14 05:25:03,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:03,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518768121] [2020-10-14 05:25:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:03,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:03,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:03,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:03,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-14 05:25:03,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:03,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:03,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:03,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:03,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:03,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:03,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:03,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:03,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:03,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:03,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:03,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:25:03,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518768121] [2020-10-14 05:25:03,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:03,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:03,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125982937] [2020-10-14 05:25:03,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:03,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:03,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:03,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:03,606 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand 6 states. [2020-10-14 05:25:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:03,685 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-10-14 05:25:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:03,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 05:25:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:03,687 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:25:03,687 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:25:03,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:25:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-10-14 05:25:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 05:25:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2020-10-14 05:25:03,700 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 21 [2020-10-14 05:25:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:03,701 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2020-10-14 05:25:03,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2020-10-14 05:25:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:25:03,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:03,704 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:03,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:25:03,705 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash 719813504, now seen corresponding path program 2 times [2020-10-14 05:25:03,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:03,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998993426] [2020-10-14 05:25:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:03,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:04,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:04,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:04,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-14 05:25:04,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:04,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:25:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:04,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:04,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:04,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:04,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:04,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:04,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:04,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:04,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:04,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:04,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:04,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:04,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:04,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998993426] [2020-10-14 05:25:04,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:04,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:04,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850116592] [2020-10-14 05:25:04,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:04,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:04,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:04,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:04,573 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 6 states. [2020-10-14 05:25:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:04,645 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2020-10-14 05:25:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:04,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 05:25:04,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:04,646 INFO L225 Difference]: With dead ends: 79 [2020-10-14 05:25:04,646 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:25:04,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:25:04,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-14 05:25:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:25:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-10-14 05:25:04,655 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 21 [2020-10-14 05:25:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:04,655 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-10-14 05:25:04,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-10-14 05:25:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:25:04,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:04,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:04,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:25:04,657 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1621002398, now seen corresponding path program 1 times [2020-10-14 05:25:04,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:04,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996055249] [2020-10-14 05:25:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:04,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:05,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:05,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-14 05:25:05,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:25:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:25:05,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:05,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:05,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:05,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:05,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:05,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:05,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996055249] [2020-10-14 05:25:05,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:05,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:05,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042867018] [2020-10-14 05:25:05,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:05,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:05,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:05,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:05,278 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 5 states. [2020-10-14 05:25:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:05,324 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2020-10-14 05:25:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:05,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 05:25:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:05,326 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:25:05,326 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 05:25:05,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 05:25:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-14 05:25:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 05:25:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2020-10-14 05:25:05,334 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 21 [2020-10-14 05:25:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:05,335 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2020-10-14 05:25:05,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2020-10-14 05:25:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:25:05,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:05,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:05,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:25:05,339 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1660655667, now seen corresponding path program 3 times [2020-10-14 05:25:05,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:05,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541625541] [2020-10-14 05:25:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:05,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:25:05,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:05,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-14 05:25:05,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:25:05,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:05,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:05,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:05,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:05,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:05,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:05,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:05,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:05,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:05,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541625541] [2020-10-14 05:25:05,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:05,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:05,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004486660] [2020-10-14 05:25:05,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:05,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:05,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:05,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:05,659 INFO L87 Difference]: Start difference. First operand 78 states and 107 transitions. Second operand 6 states. [2020-10-14 05:25:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:05,730 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2020-10-14 05:25:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:05,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 05:25:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:05,731 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:25:05,731 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 05:25:05,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 05:25:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-14 05:25:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:25:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-10-14 05:25:05,737 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 22 [2020-10-14 05:25:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:05,737 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-10-14 05:25:05,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:05,738 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-10-14 05:25:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:25:05,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:05,738 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:05,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:25:05,739 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:05,739 INFO L82 PathProgramCache]: Analyzing trace with hash -351806531, now seen corresponding path program 2 times [2020-10-14 05:25:05,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:05,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369474165] [2020-10-14 05:25:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:05,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:06,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:06,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:06,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:25:06,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:06,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-14 05:25:06,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:06,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:06,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:06,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:06,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:06,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:06,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:06,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:06,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:06,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:06,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:06,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:06,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:06,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:06,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:06,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:06,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:06,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:25:06,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369474165] [2020-10-14 05:25:06,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:06,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:06,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975515293] [2020-10-14 05:25:06,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:06,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:06,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:06,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:06,643 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 5 states. [2020-10-14 05:25:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:06,702 INFO L93 Difference]: Finished difference Result 131 states and 183 transitions. [2020-10-14 05:25:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:06,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 05:25:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:06,704 INFO L225 Difference]: With dead ends: 131 [2020-10-14 05:25:06,705 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 05:25:06,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 05:25:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2020-10-14 05:25:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 05:25:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2020-10-14 05:25:06,714 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 22 [2020-10-14 05:25:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:06,715 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2020-10-14 05:25:06,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:06,715 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2020-10-14 05:25:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:25:06,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:06,717 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 05:25:06,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:25:06,717 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:06,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:06,717 INFO L82 PathProgramCache]: Analyzing trace with hash -152614722, now seen corresponding path program 4 times [2020-10-14 05:25:06,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:06,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246813299] [2020-10-14 05:25:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:06,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:07,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:25:07,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:07,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-14 05:25:07,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:07,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:07,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:07,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:07,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:07,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:07,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:07,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:07,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:07,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:07,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:07,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:07,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:07,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:25:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:25:07,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246813299] [2020-10-14 05:25:07,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:07,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:07,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966618264] [2020-10-14 05:25:07,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:07,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:07,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:07,371 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand 8 states. [2020-10-14 05:25:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:07,547 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-10-14 05:25:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:07,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 05:25:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:07,549 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:25:07,549 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:25:07,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:25:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-14 05:25:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 05:25:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2020-10-14 05:25:07,556 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 23 [2020-10-14 05:25:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:07,557 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2020-10-14 05:25:07,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2020-10-14 05:25:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:25:07,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:07,558 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:07,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:25:07,558 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash -570639538, now seen corresponding path program 3 times [2020-10-14 05:25:07,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:07,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940987244] [2020-10-14 05:25:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:07,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:08,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:08,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:25:08,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:08,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-14 05:25:08,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:08,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:08,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:08,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:08,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:08,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:08,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:08,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:08,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:08,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:08,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:08,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:08,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:08,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:08,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 05:25:08,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940987244] [2020-10-14 05:25:08,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:08,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:08,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699285696] [2020-10-14 05:25:08,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:08,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:08,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:08,577 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand 8 states. [2020-10-14 05:25:08,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:08,730 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2020-10-14 05:25:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:08,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 05:25:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:08,734 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:25:08,734 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 05:25:08,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 05:25:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-14 05:25:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:25:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2020-10-14 05:25:08,746 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 23 [2020-10-14 05:25:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:08,747 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2020-10-14 05:25:08,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2020-10-14 05:25:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:08,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:08,748 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:08,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:25:08,748 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:08,749 INFO L82 PathProgramCache]: Analyzing trace with hash -400551297, now seen corresponding path program 5 times [2020-10-14 05:25:08,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:08,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070711714] [2020-10-14 05:25:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:08,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:08,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:08,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:09,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:09,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:09,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-14 05:25:09,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:09,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:25:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:09,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:09,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:09,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:09,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:09,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:09,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:09,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:09,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:09,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:09,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:09,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:09,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070711714] [2020-10-14 05:25:09,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:09,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:09,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412219466] [2020-10-14 05:25:09,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:09,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:09,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:09,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:09,500 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand 5 states. [2020-10-14 05:25:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:09,557 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2020-10-14 05:25:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:09,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-14 05:25:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:09,558 INFO L225 Difference]: With dead ends: 102 [2020-10-14 05:25:09,558 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:25:09,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:25:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-10-14 05:25:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 05:25:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2020-10-14 05:25:09,567 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 24 [2020-10-14 05:25:09,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:09,567 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2020-10-14 05:25:09,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2020-10-14 05:25:09,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:09,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:09,568 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:09,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:25:09,568 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:09,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:09,569 INFO L82 PathProgramCache]: Analyzing trace with hash 426770189, now seen corresponding path program 4 times [2020-10-14 05:25:09,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:09,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370791802] [2020-10-14 05:25:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:09,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:10,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:10,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:10,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-14 05:25:10,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:10,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:10,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:25:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:10,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:10,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:10,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:10,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:10,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:10,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:10,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:10,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:10,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:10,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:10,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 05:25:10,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370791802] [2020-10-14 05:25:10,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:10,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:10,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897148983] [2020-10-14 05:25:10,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:10,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:10,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:10,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:10,853 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 7 states. [2020-10-14 05:25:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:10,965 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2020-10-14 05:25:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:10,966 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 05:25:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:10,967 INFO L225 Difference]: With dead ends: 121 [2020-10-14 05:25:10,967 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 05:25:10,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 05:25:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2020-10-14 05:25:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 05:25:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2020-10-14 05:25:10,977 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 24 [2020-10-14 05:25:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:10,977 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2020-10-14 05:25:10,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2020-10-14 05:25:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:10,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:10,979 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:10,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:25:10,980 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash -73377299, now seen corresponding path program 6 times [2020-10-14 05:25:10,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:10,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866241919] [2020-10-14 05:25:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:11,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:11,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-14 05:25:11,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:11,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:11,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:11,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:11,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:11,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:11,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 05:25:11,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866241919] [2020-10-14 05:25:11,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:11,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:11,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303121862] [2020-10-14 05:25:11,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:11,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:11,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:11,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:11,635 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand 7 states. [2020-10-14 05:25:11,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:11,737 INFO L93 Difference]: Finished difference Result 223 states and 309 transitions. [2020-10-14 05:25:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:11,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 05:25:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:11,741 INFO L225 Difference]: With dead ends: 223 [2020-10-14 05:25:11,741 INFO L226 Difference]: Without dead ends: 173 [2020-10-14 05:25:11,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-14 05:25:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2020-10-14 05:25:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 05:25:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 168 transitions. [2020-10-14 05:25:11,755 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 168 transitions. Word has length 24 [2020-10-14 05:25:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:11,755 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 168 transitions. [2020-10-14 05:25:11,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 168 transitions. [2020-10-14 05:25:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:11,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:11,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:11,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:25:11,756 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:11,757 INFO L82 PathProgramCache]: Analyzing trace with hash 476914974, now seen corresponding path program 7 times [2020-10-14 05:25:11,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:11,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782018620] [2020-10-14 05:25:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:12,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:12,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-14 05:25:12,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:12,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 05:25:12,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:25:12,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:12,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:12,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:12,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:12,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:12,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:12,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:25:12,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782018620] [2020-10-14 05:25:12,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:12,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:12,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144091326] [2020-10-14 05:25:12,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:12,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:12,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:12,607 INFO L87 Difference]: Start difference. First operand 125 states and 168 transitions. Second operand 7 states. [2020-10-14 05:25:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:12,727 INFO L93 Difference]: Finished difference Result 159 states and 213 transitions. [2020-10-14 05:25:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:12,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 05:25:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:12,729 INFO L225 Difference]: With dead ends: 159 [2020-10-14 05:25:12,729 INFO L226 Difference]: Without dead ends: 145 [2020-10-14 05:25:12,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-14 05:25:12,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 126. [2020-10-14 05:25:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 05:25:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 172 transitions. [2020-10-14 05:25:12,739 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 172 transitions. Word has length 25 [2020-10-14 05:25:12,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:12,740 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 172 transitions. [2020-10-14 05:25:12,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 172 transitions. [2020-10-14 05:25:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:12,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:12,741 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:12,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:25:12,741 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:12,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:12,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2054157634, now seen corresponding path program 8 times [2020-10-14 05:25:12,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:12,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164000999] [2020-10-14 05:25:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:15,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:15,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:25:15,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2525 [2020-10-14 05:25:15,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:15,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:25:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:25:15,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:15,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:15,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:15,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:15,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:15,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:15,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:15,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:15,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:15,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:15,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:15,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:25:15,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164000999] [2020-10-14 05:25:15,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:15,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:15,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573838240] [2020-10-14 05:25:15,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:15,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:15,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:15,374 INFO L87 Difference]: Start difference. First operand 126 states and 172 transitions. Second operand 7 states. [2020-10-14 05:25:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:15,533 INFO L93 Difference]: Finished difference Result 153 states and 211 transitions. [2020-10-14 05:25:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:15,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 05:25:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:15,536 INFO L225 Difference]: With dead ends: 153 [2020-10-14 05:25:15,536 INFO L226 Difference]: Without dead ends: 138 [2020-10-14 05:25:15,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-14 05:25:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2020-10-14 05:25:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-14 05:25:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2020-10-14 05:25:15,545 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 25 [2020-10-14 05:25:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:15,547 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2020-10-14 05:25:15,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2020-10-14 05:25:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:15,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:15,548 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:15,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:25:15,548 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1604972830, now seen corresponding path program 4 times [2020-10-14 05:25:15,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:15,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545728551] [2020-10-14 05:25:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:15,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:16,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:17,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:17,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:17,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2266 [2020-10-14 05:25:17,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:17,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:17,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:17,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:25:17,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:17,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:17,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:17,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:17,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:17,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:17,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:17,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:17,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:17,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:17,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:17,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:17,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:17,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:25:17,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545728551] [2020-10-14 05:25:17,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:17,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:17,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428263662] [2020-10-14 05:25:17,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:17,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:17,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:17,899 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand 7 states. [2020-10-14 05:25:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:17,984 INFO L93 Difference]: Finished difference Result 178 states and 247 transitions. [2020-10-14 05:25:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:17,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 05:25:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:17,987 INFO L225 Difference]: With dead ends: 178 [2020-10-14 05:25:17,987 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 05:25:17,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 05:25:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2020-10-14 05:25:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 05:25:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 210 transitions. [2020-10-14 05:25:17,997 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 210 transitions. Word has length 25 [2020-10-14 05:25:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:17,997 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 210 transitions. [2020-10-14 05:25:17,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 210 transitions. [2020-10-14 05:25:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:17,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:17,998 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:17,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:25:17,999 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:17,999 INFO L82 PathProgramCache]: Analyzing trace with hash 81500478, now seen corresponding path program 9 times [2020-10-14 05:25:18,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:18,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028446769] [2020-10-14 05:25:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:18,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:18,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:18,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-14 05:25:18,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:18,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:25:18,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:18,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:18,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:18,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:18,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:18,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:18,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:18,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:18,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:18,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:18,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:18,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 05:25:18,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028446769] [2020-10-14 05:25:18,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:18,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:18,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279811671] [2020-10-14 05:25:18,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:18,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:18,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:18,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:18,744 INFO L87 Difference]: Start difference. First operand 156 states and 210 transitions. Second operand 8 states. [2020-10-14 05:25:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:18,961 INFO L93 Difference]: Finished difference Result 334 states and 456 transitions. [2020-10-14 05:25:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:18,962 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-14 05:25:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:18,965 INFO L225 Difference]: With dead ends: 334 [2020-10-14 05:25:18,965 INFO L226 Difference]: Without dead ends: 279 [2020-10-14 05:25:18,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-14 05:25:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 189. [2020-10-14 05:25:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-14 05:25:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 249 transitions. [2020-10-14 05:25:18,988 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 249 transitions. Word has length 25 [2020-10-14 05:25:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:18,988 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 249 transitions. [2020-10-14 05:25:18,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 249 transitions. [2020-10-14 05:25:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:18,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:18,990 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:18,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:25:18,991 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2043415758, now seen corresponding path program 10 times [2020-10-14 05:25:18,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:18,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360677878] [2020-10-14 05:25:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:19,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:19,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:20,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:20,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:20,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1824 [2020-10-14 05:25:20,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:20,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:20,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:20,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:25:20,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:25:20,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:20,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:20,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:20,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:20,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:20,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:20,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:20,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:20,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:20,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:20,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:20,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:20,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:25:20,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360677878] [2020-10-14 05:25:20,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:20,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:20,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025633873] [2020-10-14 05:25:20,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:20,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:20,962 INFO L87 Difference]: Start difference. First operand 189 states and 249 transitions. Second operand 8 states. [2020-10-14 05:25:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:21,065 INFO L93 Difference]: Finished difference Result 256 states and 355 transitions. [2020-10-14 05:25:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:21,065 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 05:25:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:21,067 INFO L225 Difference]: With dead ends: 256 [2020-10-14 05:25:21,067 INFO L226 Difference]: Without dead ends: 236 [2020-10-14 05:25:21,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-14 05:25:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 216. [2020-10-14 05:25:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-14 05:25:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 285 transitions. [2020-10-14 05:25:21,082 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 285 transitions. Word has length 26 [2020-10-14 05:25:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:21,082 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 285 transitions. [2020-10-14 05:25:21,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 285 transitions. [2020-10-14 05:25:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:21,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:21,084 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:21,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:25:21,084 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash 487367119, now seen corresponding path program 11 times [2020-10-14 05:25:21,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:21,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838757244] [2020-10-14 05:25:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:21,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:21,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:21,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:21,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-14 05:25:21,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:21,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:21,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:21,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:21,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:21,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:21,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:21,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:21,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:21,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:21,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:21,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:21,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:21,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:21,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:21,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:21,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 05:25:21,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838757244] [2020-10-14 05:25:21,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:21,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:21,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449034054] [2020-10-14 05:25:21,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:21,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:21,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:21,617 INFO L87 Difference]: Start difference. First operand 216 states and 285 transitions. Second operand 8 states. [2020-10-14 05:25:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:21,796 INFO L93 Difference]: Finished difference Result 271 states and 346 transitions. [2020-10-14 05:25:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:21,796 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 05:25:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:21,799 INFO L225 Difference]: With dead ends: 271 [2020-10-14 05:25:21,799 INFO L226 Difference]: Without dead ends: 256 [2020-10-14 05:25:21,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-14 05:25:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 212. [2020-10-14 05:25:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-14 05:25:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 280 transitions. [2020-10-14 05:25:21,813 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 280 transitions. Word has length 26 [2020-10-14 05:25:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:21,813 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 280 transitions. [2020-10-14 05:25:21,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 280 transitions. [2020-10-14 05:25:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:21,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:21,814 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:21,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:25:21,815 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:21,815 INFO L82 PathProgramCache]: Analyzing trace with hash 587744269, now seen corresponding path program 12 times [2020-10-14 05:25:21,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:21,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835722362] [2020-10-14 05:25:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:22,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:22,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:22,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-14 05:25:22,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:22,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:25:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:25:22,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:22,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:22,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:22,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:22,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:22,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:22,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:22,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:22,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:22,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:22,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-14 05:25:22,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835722362] [2020-10-14 05:25:22,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:22,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:22,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513149588] [2020-10-14 05:25:22,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:22,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:22,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:22,535 INFO L87 Difference]: Start difference. First operand 212 states and 280 transitions. Second operand 6 states. [2020-10-14 05:25:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:22,643 INFO L93 Difference]: Finished difference Result 219 states and 286 transitions. [2020-10-14 05:25:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:22,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-14 05:25:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:22,646 INFO L225 Difference]: With dead ends: 219 [2020-10-14 05:25:22,646 INFO L226 Difference]: Without dead ends: 203 [2020-10-14 05:25:22,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-14 05:25:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2020-10-14 05:25:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-14 05:25:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 264 transitions. [2020-10-14 05:25:22,681 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 264 transitions. Word has length 26 [2020-10-14 05:25:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:22,682 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 264 transitions. [2020-10-14 05:25:22,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:22,682 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 264 transitions. [2020-10-14 05:25:22,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:25:22,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:22,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:22,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:25:22,684 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:22,685 INFO L82 PathProgramCache]: Analyzing trace with hash -390883138, now seen corresponding path program 13 times [2020-10-14 05:25:22,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:22,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417078885] [2020-10-14 05:25:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:22,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:22,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:23,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:25:23,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:23,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-14 05:25:23,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:23,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:23,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:23,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:23,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:23,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:23,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:23,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:23,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:23,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:23,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:23,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:23,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:23,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:23,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:23,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:23,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:25:23,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417078885] [2020-10-14 05:25:23,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:23,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:23,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967062572] [2020-10-14 05:25:23,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:23,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:23,220 INFO L87 Difference]: Start difference. First operand 203 states and 264 transitions. Second operand 8 states. [2020-10-14 05:25:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:23,574 INFO L93 Difference]: Finished difference Result 236 states and 301 transitions. [2020-10-14 05:25:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:25:23,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-14 05:25:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:23,576 INFO L225 Difference]: With dead ends: 236 [2020-10-14 05:25:23,576 INFO L226 Difference]: Without dead ends: 198 [2020-10-14 05:25:23,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-14 05:25:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 173. [2020-10-14 05:25:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 05:25:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 222 transitions. [2020-10-14 05:25:23,588 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 222 transitions. Word has length 27 [2020-10-14 05:25:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:23,589 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 222 transitions. [2020-10-14 05:25:23,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 222 transitions. [2020-10-14 05:25:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:25:23,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:23,590 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:23,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:25:23,590 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:23,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:23,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1755156094, now seen corresponding path program 14 times [2020-10-14 05:25:23,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:23,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717439696] [2020-10-14 05:25:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:23,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:24,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:25:24,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:24,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-14 05:25:24,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:24,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:25:24,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:25:24,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:24,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:24,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:24,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:24,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:24,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:24,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:24,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:24,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-14 05:25:24,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717439696] [2020-10-14 05:25:24,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:24,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:24,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047416380] [2020-10-14 05:25:24,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:24,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:24,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:24,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:24,783 INFO L87 Difference]: Start difference. First operand 173 states and 222 transitions. Second operand 6 states. [2020-10-14 05:25:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:24,847 INFO L93 Difference]: Finished difference Result 203 states and 256 transitions. [2020-10-14 05:25:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:24,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-14 05:25:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:24,849 INFO L225 Difference]: With dead ends: 203 [2020-10-14 05:25:24,849 INFO L226 Difference]: Without dead ends: 173 [2020-10-14 05:25:24,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-14 05:25:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 158. [2020-10-14 05:25:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-14 05:25:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 202 transitions. [2020-10-14 05:25:24,861 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 202 transitions. Word has length 27 [2020-10-14 05:25:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:24,861 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 202 transitions. [2020-10-14 05:25:24,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 202 transitions. [2020-10-14 05:25:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:24,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:24,862 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:24,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:25:24,863 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:24,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:24,863 INFO L82 PathProgramCache]: Analyzing trace with hash 424140461, now seen corresponding path program 15 times [2020-10-14 05:25:24,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:24,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946287511] [2020-10-14 05:25:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:24,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:24,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:25,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:25,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:25,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-14 05:25:25,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:25,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:25,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:25,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:25,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:25,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:25,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:25,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:25,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:25,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:25,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:25,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:25,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:25,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:25,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:25,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:25,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:25:25,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946287511] [2020-10-14 05:25:25,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:25,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:25,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090009580] [2020-10-14 05:25:25,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:25,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:25,589 INFO L87 Difference]: Start difference. First operand 158 states and 202 transitions. Second operand 9 states. [2020-10-14 05:25:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:25,749 INFO L93 Difference]: Finished difference Result 194 states and 241 transitions. [2020-10-14 05:25:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:25,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-14 05:25:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:25,751 INFO L225 Difference]: With dead ends: 194 [2020-10-14 05:25:25,751 INFO L226 Difference]: Without dead ends: 178 [2020-10-14 05:25:25,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-14 05:25:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2020-10-14 05:25:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 05:25:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 197 transitions. [2020-10-14 05:25:25,763 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 197 transitions. Word has length 28 [2020-10-14 05:25:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:25,764 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 197 transitions. [2020-10-14 05:25:25,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 197 transitions. [2020-10-14 05:25:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:25,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:25,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:25,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:25:25,765 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1536462785, now seen corresponding path program 16 times [2020-10-14 05:25:25,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:25,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763160885] [2020-10-14 05:25:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:25,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:25,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:26,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:26,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:26,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-10-14 05:25:26,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:26,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:26,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:26,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 05:25:26,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:26,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:27,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:27,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:27,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:27,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:27,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:27,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:27,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:27,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:27,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:27,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:27,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:27,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 05:25:27,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763160885] [2020-10-14 05:25:27,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:27,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:27,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830595757] [2020-10-14 05:25:27,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:27,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:27,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:27,089 INFO L87 Difference]: Start difference. First operand 154 states and 197 transitions. Second operand 8 states. [2020-10-14 05:25:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:27,224 INFO L93 Difference]: Finished difference Result 190 states and 250 transitions. [2020-10-14 05:25:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:27,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 05:25:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:27,226 INFO L225 Difference]: With dead ends: 190 [2020-10-14 05:25:27,226 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 05:25:27,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 05:25:27,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 167. [2020-10-14 05:25:27,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 05:25:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 216 transitions. [2020-10-14 05:25:27,244 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 216 transitions. Word has length 28 [2020-10-14 05:25:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:27,244 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 216 transitions. [2020-10-14 05:25:27,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 216 transitions. [2020-10-14 05:25:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:27,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:27,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:27,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:25:27,246 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:27,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:27,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1699936783, now seen corresponding path program 17 times [2020-10-14 05:25:27,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:27,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057593060] [2020-10-14 05:25:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:27,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:27,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:27,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:27,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:28,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:28,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:28,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:28,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-14 05:25:28,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:28,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:25:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 05:25:28,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:25:28,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:28,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:28,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:28,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:28,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:28,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:28,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:28,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:28,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:28,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:28,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:28,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:28,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:28,217 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 05:25:28,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057593060] [2020-10-14 05:25:28,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:28,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:28,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158709339] [2020-10-14 05:25:28,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:28,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:28,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:28,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:28,219 INFO L87 Difference]: Start difference. First operand 167 states and 216 transitions. Second operand 8 states. [2020-10-14 05:25:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:28,381 INFO L93 Difference]: Finished difference Result 227 states and 289 transitions. [2020-10-14 05:25:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:28,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-14 05:25:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:28,383 INFO L225 Difference]: With dead ends: 227 [2020-10-14 05:25:28,383 INFO L226 Difference]: Without dead ends: 210 [2020-10-14 05:25:28,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-14 05:25:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 179. [2020-10-14 05:25:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 05:25:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 232 transitions. [2020-10-14 05:25:28,397 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 232 transitions. Word has length 30 [2020-10-14 05:25:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:28,397 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 232 transitions. [2020-10-14 05:25:28,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 232 transitions. [2020-10-14 05:25:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:28,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:28,398 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:28,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:25:28,399 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:28,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1106991537, now seen corresponding path program 18 times [2020-10-14 05:25:28,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:28,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013166710] [2020-10-14 05:25:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:28,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:28,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:28,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:31,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:31,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:31,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3266 [2020-10-14 05:25:31,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:31,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:25:31,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:31,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:31,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:31,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:31,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:31,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:31,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:31,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:31,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:31,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:31,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:31,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 05:25:31,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013166710] [2020-10-14 05:25:31,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:31,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:31,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995214664] [2020-10-14 05:25:31,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:31,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:31,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:31,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:31,826 INFO L87 Difference]: Start difference. First operand 179 states and 232 transitions. Second operand 9 states. [2020-10-14 05:25:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:31,987 INFO L93 Difference]: Finished difference Result 244 states and 334 transitions. [2020-10-14 05:25:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:31,988 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-14 05:25:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:31,991 INFO L225 Difference]: With dead ends: 244 [2020-10-14 05:25:31,991 INFO L226 Difference]: Without dead ends: 222 [2020-10-14 05:25:31,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-14 05:25:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 202. [2020-10-14 05:25:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-14 05:25:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 262 transitions. [2020-10-14 05:25:32,007 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 262 transitions. Word has length 30 [2020-10-14 05:25:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:32,007 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 262 transitions. [2020-10-14 05:25:32,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 262 transitions. [2020-10-14 05:25:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:32,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:32,008 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:32,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:25:32,008 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:32,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:32,010 INFO L82 PathProgramCache]: Analyzing trace with hash 409843917, now seen corresponding path program 19 times [2020-10-14 05:25:32,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:32,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221384457] [2020-10-14 05:25:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:32,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:32,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:32,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:32,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:33,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:33,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:33,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1201 [2020-10-14 05:25:33,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:33,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:33,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:33,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:25:33,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:25:33,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:33,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:33,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:33,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:33,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:33,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:33,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 05:25:33,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221384457] [2020-10-14 05:25:33,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:33,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:33,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622239472] [2020-10-14 05:25:33,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:33,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:33,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:33,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:33,304 INFO L87 Difference]: Start difference. First operand 202 states and 262 transitions. Second operand 8 states. [2020-10-14 05:25:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:33,494 INFO L93 Difference]: Finished difference Result 255 states and 322 transitions. [2020-10-14 05:25:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:33,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-14 05:25:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:33,496 INFO L225 Difference]: With dead ends: 255 [2020-10-14 05:25:33,496 INFO L226 Difference]: Without dead ends: 216 [2020-10-14 05:25:33,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-14 05:25:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2020-10-14 05:25:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-14 05:25:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-10-14 05:25:33,516 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 238 transitions. Word has length 30 [2020-10-14 05:25:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:33,516 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-10-14 05:25:33,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 238 transitions. [2020-10-14 05:25:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:25:33,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:33,517 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:33,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:25:33,517 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash 411906977, now seen corresponding path program 20 times [2020-10-14 05:25:33,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:33,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766591611] [2020-10-14 05:25:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:33,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:35,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:25:35,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:35,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2437 [2020-10-14 05:25:35,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:35,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:25:35,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:36,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:36,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:36,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:36,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:36,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:36,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:36,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:36,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:36,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 05:25:36,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766591611] [2020-10-14 05:25:36,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:36,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:36,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534912832] [2020-10-14 05:25:36,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:36,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:36,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:36,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:36,096 INFO L87 Difference]: Start difference. First operand 184 states and 238 transitions. Second operand 10 states. [2020-10-14 05:25:36,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:36,281 INFO L93 Difference]: Finished difference Result 253 states and 348 transitions. [2020-10-14 05:25:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:36,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-14 05:25:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:36,285 INFO L225 Difference]: With dead ends: 253 [2020-10-14 05:25:36,285 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 05:25:36,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:36,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 05:25:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 207. [2020-10-14 05:25:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-14 05:25:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 268 transitions. [2020-10-14 05:25:36,300 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 268 transitions. Word has length 31 [2020-10-14 05:25:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:36,300 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 268 transitions. [2020-10-14 05:25:36,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 268 transitions. [2020-10-14 05:25:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:25:36,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:36,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:36,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:25:36,302 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:36,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1630738579, now seen corresponding path program 21 times [2020-10-14 05:25:36,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:36,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024682984] [2020-10-14 05:25:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:36,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:36,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:37,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:25:37,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:37,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-14 05:25:37,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:37,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:37,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:37,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:37,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:37,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:37,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:37,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:37,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:37,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-14 05:25:37,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024682984] [2020-10-14 05:25:37,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:37,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:37,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318934438] [2020-10-14 05:25:37,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:37,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:37,231 INFO L87 Difference]: Start difference. First operand 207 states and 268 transitions. Second operand 10 states. [2020-10-14 05:25:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:37,395 INFO L93 Difference]: Finished difference Result 229 states and 293 transitions. [2020-10-14 05:25:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:37,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-14 05:25:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:37,397 INFO L225 Difference]: With dead ends: 229 [2020-10-14 05:25:37,397 INFO L226 Difference]: Without dead ends: 177 [2020-10-14 05:25:37,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-14 05:25:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-10-14 05:25:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 05:25:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2020-10-14 05:25:37,409 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 32 [2020-10-14 05:25:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:37,409 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2020-10-14 05:25:37,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2020-10-14 05:25:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:25:37,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:37,411 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:37,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:25:37,411 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash 761043055, now seen corresponding path program 22 times [2020-10-14 05:25:37,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:37,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121246609] [2020-10-14 05:25:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:37,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:39,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:39,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:25:39,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:39,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2362 [2020-10-14 05:25:39,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:39,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:39,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:39,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:25:39,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:25:39,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:39,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:39,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:39,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:39,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:39,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:39,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:39,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:39,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:39,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:39,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:39,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 05:25:39,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121246609] [2020-10-14 05:25:39,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:39,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:39,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838892199] [2020-10-14 05:25:39,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:39,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:39,889 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand 9 states. [2020-10-14 05:25:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:40,009 INFO L93 Difference]: Finished difference Result 223 states and 301 transitions. [2020-10-14 05:25:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:40,010 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-14 05:25:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:40,012 INFO L225 Difference]: With dead ends: 223 [2020-10-14 05:25:40,012 INFO L226 Difference]: Without dead ends: 217 [2020-10-14 05:25:40,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-14 05:25:40,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 193. [2020-10-14 05:25:40,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 05:25:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 255 transitions. [2020-10-14 05:25:40,025 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 255 transitions. Word has length 32 [2020-10-14 05:25:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:40,025 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 255 transitions. [2020-10-14 05:25:40,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 255 transitions. [2020-10-14 05:25:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:25:40,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:40,026 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:40,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:25:40,027 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:40,027 INFO L82 PathProgramCache]: Analyzing trace with hash -50676066, now seen corresponding path program 23 times [2020-10-14 05:25:40,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:40,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815131576] [2020-10-14 05:25:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:40,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1125 [2020-10-14 05:25:41,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:41,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:41,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:41,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:41,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:41,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:41,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:41,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:41,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:41,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:41,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:41,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:41,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-14 05:25:41,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815131576] [2020-10-14 05:25:41,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:41,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:25:41,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15734258] [2020-10-14 05:25:41,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:25:41,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:25:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:41,280 INFO L87 Difference]: Start difference. First operand 193 states and 255 transitions. Second operand 11 states. [2020-10-14 05:25:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:41,552 INFO L93 Difference]: Finished difference Result 244 states and 310 transitions. [2020-10-14 05:25:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:25:41,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-14 05:25:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:41,554 INFO L225 Difference]: With dead ends: 244 [2020-10-14 05:25:41,554 INFO L226 Difference]: Without dead ends: 225 [2020-10-14 05:25:41,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-14 05:25:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 188. [2020-10-14 05:25:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-14 05:25:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 249 transitions. [2020-10-14 05:25:41,566 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 249 transitions. Word has length 33 [2020-10-14 05:25:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:41,566 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 249 transitions. [2020-10-14 05:25:41,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:25:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 249 transitions. [2020-10-14 05:25:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:25:41,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:41,568 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:41,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:25:41,568 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash 539772752, now seen corresponding path program 24 times [2020-10-14 05:25:41,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:41,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654502238] [2020-10-14 05:25:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:45,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:25:45,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:45,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4003 [2020-10-14 05:25:45,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:45,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:25:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:45,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:25:45,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:45,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:45,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:45,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:45,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:45,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:45,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:45,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:45,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:45,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:45,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 05:25:45,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654502238] [2020-10-14 05:25:45,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:45,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:45,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898572385] [2020-10-14 05:25:45,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:45,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:45,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:45,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:45,655 INFO L87 Difference]: Start difference. First operand 188 states and 249 transitions. Second operand 8 states. [2020-10-14 05:25:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:45,850 INFO L93 Difference]: Finished difference Result 401 states and 528 transitions. [2020-10-14 05:25:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:45,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-14 05:25:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:45,856 INFO L225 Difference]: With dead ends: 401 [2020-10-14 05:25:45,856 INFO L226 Difference]: Without dead ends: 315 [2020-10-14 05:25:45,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:45,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-14 05:25:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 235. [2020-10-14 05:25:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 05:25:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 303 transitions. [2020-10-14 05:25:45,881 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 303 transitions. Word has length 33 [2020-10-14 05:25:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:45,882 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 303 transitions. [2020-10-14 05:25:45,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 303 transitions. [2020-10-14 05:25:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:25:45,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:45,884 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:45,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:25:45,884 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1486572769, now seen corresponding path program 25 times [2020-10-14 05:25:45,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:45,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940877048] [2020-10-14 05:25:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:45,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:46,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:46,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:47,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:25:49,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:49,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3462 [2020-10-14 05:25:49,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:25:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:25:49,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:49,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:49,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:49,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:49,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:49,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:49,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:49,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-14 05:25:49,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940877048] [2020-10-14 05:25:49,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:49,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:49,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540638752] [2020-10-14 05:25:49,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:49,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:49,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:49,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:49,491 INFO L87 Difference]: Start difference. First operand 235 states and 303 transitions. Second operand 10 states. [2020-10-14 05:25:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:49,676 INFO L93 Difference]: Finished difference Result 282 states and 374 transitions. [2020-10-14 05:25:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:49,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-14 05:25:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:49,678 INFO L225 Difference]: With dead ends: 282 [2020-10-14 05:25:49,678 INFO L226 Difference]: Without dead ends: 276 [2020-10-14 05:25:49,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-14 05:25:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2020-10-14 05:25:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-14 05:25:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 326 transitions. [2020-10-14 05:25:49,693 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 326 transitions. Word has length 34 [2020-10-14 05:25:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:49,693 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 326 transitions. [2020-10-14 05:25:49,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 326 transitions. [2020-10-14 05:25:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:25:49,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:49,695 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:49,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:25:49,695 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:49,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1210303682, now seen corresponding path program 26 times [2020-10-14 05:25:49,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:49,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942651712] [2020-10-14 05:25:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:49,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:51,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:25:51,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:51,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1370 [2020-10-14 05:25:51,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:51,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:25:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:25:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:25:51,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:51,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:51,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:51,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:51,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:51,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:51,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:51,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:51,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:51,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:51,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:51,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:25:51,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942651712] [2020-10-14 05:25:51,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:51,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:51,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534458919] [2020-10-14 05:25:51,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:51,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:51,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:51,167 INFO L87 Difference]: Start difference. First operand 251 states and 326 transitions. Second operand 9 states. [2020-10-14 05:25:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:51,356 INFO L93 Difference]: Finished difference Result 386 states and 483 transitions. [2020-10-14 05:25:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:51,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-14 05:25:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:51,359 INFO L225 Difference]: With dead ends: 386 [2020-10-14 05:25:51,359 INFO L226 Difference]: Without dead ends: 366 [2020-10-14 05:25:51,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-14 05:25:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 265. [2020-10-14 05:25:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-14 05:25:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 345 transitions. [2020-10-14 05:25:51,376 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 345 transitions. Word has length 35 [2020-10-14 05:25:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:51,376 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 345 transitions. [2020-10-14 05:25:51,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 345 transitions. [2020-10-14 05:25:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:25:51,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:51,377 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:51,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:25:51,377 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:51,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2123287394, now seen corresponding path program 27 times [2020-10-14 05:25:51,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:51,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962794583] [2020-10-14 05:25:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:51,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:55,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:56,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:25:56,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:25:56,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:56,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:25:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:56,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:25:56,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:56,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:56,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:56,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:56,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:56,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:56,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:56,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:56,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:56,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:56,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:56,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:25:56,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962794583] [2020-10-14 05:25:56,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:56,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:25:56,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932531564] [2020-10-14 05:25:56,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:25:56,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:25:56,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:56,540 INFO L87 Difference]: Start difference. First operand 265 states and 345 transitions. Second operand 11 states. [2020-10-14 05:25:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:56,723 INFO L93 Difference]: Finished difference Result 364 states and 509 transitions. [2020-10-14 05:25:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:25:56,723 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-14 05:25:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:56,725 INFO L225 Difference]: With dead ends: 364 [2020-10-14 05:25:56,725 INFO L226 Difference]: Without dead ends: 336 [2020-10-14 05:25:56,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-14 05:25:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 294. [2020-10-14 05:25:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-14 05:25:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 383 transitions. [2020-10-14 05:25:56,748 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 383 transitions. Word has length 35 [2020-10-14 05:25:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:56,749 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 383 transitions. [2020-10-14 05:25:56,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:25:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 383 transitions. [2020-10-14 05:25:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:25:56,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:56,750 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:56,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:25:56,751 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:56,751 INFO L82 PathProgramCache]: Analyzing trace with hash -469223298, now seen corresponding path program 28 times [2020-10-14 05:25:56,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:56,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023212415] [2020-10-14 05:25:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:56,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:57,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:57,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:59,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:25:59,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:59,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3066 [2020-10-14 05:25:59,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:59,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:25:59,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:59,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:25:59,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:59,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:59,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:59,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:59,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:59,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:59,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:59,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:59,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:59,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:59,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:59,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-14 05:25:59,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023212415] [2020-10-14 05:25:59,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:59,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:59,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377437995] [2020-10-14 05:25:59,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:59,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:59,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:59,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:59,940 INFO L87 Difference]: Start difference. First operand 294 states and 383 transitions. Second operand 10 states. [2020-10-14 05:26:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:00,190 INFO L93 Difference]: Finished difference Result 649 states and 843 transitions. [2020-10-14 05:26:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:26:00,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-14 05:26:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:00,195 INFO L225 Difference]: With dead ends: 649 [2020-10-14 05:26:00,195 INFO L226 Difference]: Without dead ends: 527 [2020-10-14 05:26:00,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-10-14 05:26:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 355. [2020-10-14 05:26:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-14 05:26:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 452 transitions. [2020-10-14 05:26:00,227 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 452 transitions. Word has length 35 [2020-10-14 05:26:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:00,227 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 452 transitions. [2020-10-14 05:26:00,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:26:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 452 transitions. [2020-10-14 05:26:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:26:00,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:00,233 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:00,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:26:00,233 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662510, now seen corresponding path program 29 times [2020-10-14 05:26:00,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:00,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851715985] [2020-10-14 05:26:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:00,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:05,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:05,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:26:05,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:05,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:26:05,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:05,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:26:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:26:05,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:05,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:05,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:05,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:05,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:05,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:05,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:05,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:05,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:05,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:05,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:05,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:05,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:26:05,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851715985] [2020-10-14 05:26:05,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:05,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:05,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010323251] [2020-10-14 05:26:05,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:05,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:05,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:05,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:05,446 INFO L87 Difference]: Start difference. First operand 355 states and 452 transitions. Second operand 12 states. [2020-10-14 05:26:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:05,716 INFO L93 Difference]: Finished difference Result 468 states and 637 transitions. [2020-10-14 05:26:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:26:05,717 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-14 05:26:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:05,719 INFO L225 Difference]: With dead ends: 468 [2020-10-14 05:26:05,719 INFO L226 Difference]: Without dead ends: 440 [2020-10-14 05:26:05,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-14 05:26:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 392. [2020-10-14 05:26:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-14 05:26:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 499 transitions. [2020-10-14 05:26:05,742 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 499 transitions. Word has length 36 [2020-10-14 05:26:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:05,742 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 499 transitions. [2020-10-14 05:26:05,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:26:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 499 transitions. [2020-10-14 05:26:05,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:26:05,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:05,744 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:05,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:26:05,744 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:05,744 INFO L82 PathProgramCache]: Analyzing trace with hash 983580719, now seen corresponding path program 30 times [2020-10-14 05:26:05,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:05,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139296924] [2020-10-14 05:26:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:05,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:05,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:05,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:06,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:26:06,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:06,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-14 05:26:06,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:06,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:26:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:07,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:07,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:07,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:07,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:07,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:07,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:07,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:07,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:07,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:07,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:07,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:07,041 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 05:26:07,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139296924] [2020-10-14 05:26:07,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:07,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:07,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684311446] [2020-10-14 05:26:07,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:07,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:07,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:07,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:07,044 INFO L87 Difference]: Start difference. First operand 392 states and 499 transitions. Second operand 12 states. [2020-10-14 05:26:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:07,458 INFO L93 Difference]: Finished difference Result 502 states and 619 transitions. [2020-10-14 05:26:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:26:07,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-14 05:26:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:07,461 INFO L225 Difference]: With dead ends: 502 [2020-10-14 05:26:07,462 INFO L226 Difference]: Without dead ends: 481 [2020-10-14 05:26:07,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:26:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-14 05:26:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 386. [2020-10-14 05:26:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-14 05:26:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 492 transitions. [2020-10-14 05:26:07,484 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 492 transitions. Word has length 36 [2020-10-14 05:26:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:07,484 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 492 transitions. [2020-10-14 05:26:07,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:26:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 492 transitions. [2020-10-14 05:26:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:26:07,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:07,486 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:07,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:26:07,486 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:07,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2127883405, now seen corresponding path program 31 times [2020-10-14 05:26:07,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:07,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867178952] [2020-10-14 05:26:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:07,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:08,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:10,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:10,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:26:10,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:10,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3493 [2020-10-14 05:26:10,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:10,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:10,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:26:10,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 05:26:10,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:26:10,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:11,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:11,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:11,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:11,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:11,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:11,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:11,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:11,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:11,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-14 05:26:11,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867178952] [2020-10-14 05:26:11,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:11,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:26:11,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136805725] [2020-10-14 05:26:11,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:26:11,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:11,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:26:11,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:11,097 INFO L87 Difference]: Start difference. First operand 386 states and 492 transitions. Second operand 10 states. [2020-10-14 05:26:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:11,360 INFO L93 Difference]: Finished difference Result 533 states and 653 transitions. [2020-10-14 05:26:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:26:11,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-14 05:26:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:11,364 INFO L225 Difference]: With dead ends: 533 [2020-10-14 05:26:11,364 INFO L226 Difference]: Without dead ends: 479 [2020-10-14 05:26:11,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-10-14 05:26:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 362. [2020-10-14 05:26:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-14 05:26:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 461 transitions. [2020-10-14 05:26:11,385 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 461 transitions. Word has length 36 [2020-10-14 05:26:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:11,385 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 461 transitions. [2020-10-14 05:26:11,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:26:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 461 transitions. [2020-10-14 05:26:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:26:11,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:11,387 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:11,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:26:11,388 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2145022893, now seen corresponding path program 32 times [2020-10-14 05:26:11,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:11,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15555621] [2020-10-14 05:26:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:11,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:11,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:12,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:12,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:13,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:26:13,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:13,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2055 [2020-10-14 05:26:13,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:13,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:13,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:26:13,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:13,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:26:13,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:13,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:13,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:13,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:13,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:13,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:13,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:13,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:13,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-14 05:26:13,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15555621] [2020-10-14 05:26:13,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:13,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:26:13,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956604198] [2020-10-14 05:26:13,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:26:13,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:13,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:26:13,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:13,582 INFO L87 Difference]: Start difference. First operand 362 states and 461 transitions. Second operand 11 states. [2020-10-14 05:26:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:13,854 INFO L93 Difference]: Finished difference Result 800 states and 1022 transitions. [2020-10-14 05:26:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:26:13,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-14 05:26:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:13,858 INFO L225 Difference]: With dead ends: 800 [2020-10-14 05:26:13,859 INFO L226 Difference]: Without dead ends: 701 [2020-10-14 05:26:13,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-10-14 05:26:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 431. [2020-10-14 05:26:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-10-14 05:26:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 538 transitions. [2020-10-14 05:26:13,883 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 538 transitions. Word has length 36 [2020-10-14 05:26:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:13,883 INFO L479 AbstractCegarLoop]: Abstraction has 431 states and 538 transitions. [2020-10-14 05:26:13,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:26:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 538 transitions. [2020-10-14 05:26:13,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:26:13,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:13,884 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:13,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:26:13,885 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:13,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1300899486, now seen corresponding path program 33 times [2020-10-14 05:26:13,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:13,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632923225] [2020-10-14 05:26:13,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:15,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:15,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:26:15,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1685 [2020-10-14 05:26:15,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:15,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:15,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:15,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:15,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:26:15,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:15,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:15,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:15,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:15,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:15,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:15,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:15,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:15,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:15,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-14 05:26:15,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632923225] [2020-10-14 05:26:15,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:15,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:15,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304454590] [2020-10-14 05:26:15,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:15,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:15,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:15,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:15,720 INFO L87 Difference]: Start difference. First operand 431 states and 538 transitions. Second operand 12 states. [2020-10-14 05:26:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:15,937 INFO L93 Difference]: Finished difference Result 457 states and 568 transitions. [2020-10-14 05:26:15,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:26:15,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-14 05:26:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:15,939 INFO L225 Difference]: With dead ends: 457 [2020-10-14 05:26:15,939 INFO L226 Difference]: Without dead ends: 389 [2020-10-14 05:26:15,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:26:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-14 05:26:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2020-10-14 05:26:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-14 05:26:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 489 transitions. [2020-10-14 05:26:15,960 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 489 transitions. Word has length 37 [2020-10-14 05:26:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:15,960 INFO L479 AbstractCegarLoop]: Abstraction has 389 states and 489 transitions. [2020-10-14 05:26:15,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:26:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 489 transitions. [2020-10-14 05:26:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:26:15,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:15,962 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:15,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:26:15,962 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:15,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1050952062, now seen corresponding path program 34 times [2020-10-14 05:26:15,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:15,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473645128] [2020-10-14 05:26:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:15,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:16,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:16,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:18,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:18,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:26:18,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:18,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-14 05:26:18,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:18,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:18,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:26:18,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 05:26:18,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:26:18,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:18,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:18,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:18,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:18,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:18,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:18,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:18,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:18,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-14 05:26:18,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473645128] [2020-10-14 05:26:18,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:18,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:26:18,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630494191] [2020-10-14 05:26:18,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:26:18,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:26:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:18,880 INFO L87 Difference]: Start difference. First operand 389 states and 489 transitions. Second operand 10 states. [2020-10-14 05:26:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:19,480 INFO L93 Difference]: Finished difference Result 497 states and 608 transitions. [2020-10-14 05:26:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:26:19,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-14 05:26:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:19,484 INFO L225 Difference]: With dead ends: 497 [2020-10-14 05:26:19,484 INFO L226 Difference]: Without dead ends: 473 [2020-10-14 05:26:19,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:26:19,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-14 05:26:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 374. [2020-10-14 05:26:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-14 05:26:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-10-14 05:26:19,504 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 37 [2020-10-14 05:26:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:19,504 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-10-14 05:26:19,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:26:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-10-14 05:26:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:26:19,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:19,505 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:19,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:26:19,505 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:19,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1017409101, now seen corresponding path program 35 times [2020-10-14 05:26:19,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:19,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673094574] [2020-10-14 05:26:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:19,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:19,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:22,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:22,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:26:22,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:22,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3061 [2020-10-14 05:26:22,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:22,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:22,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:26:22,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:22,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:26:22,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:22,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:22,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:22,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:22,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:22,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:22,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:22,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:22,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:22,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:22,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:22,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:22,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-14 05:26:22,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673094574] [2020-10-14 05:26:22,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:22,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:26:22,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031431315] [2020-10-14 05:26:22,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:26:22,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:26:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:26:22,738 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 13 states. [2020-10-14 05:26:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:23,081 INFO L93 Difference]: Finished difference Result 443 states and 537 transitions. [2020-10-14 05:26:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:26:23,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-14 05:26:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:23,083 INFO L225 Difference]: With dead ends: 443 [2020-10-14 05:26:23,083 INFO L226 Difference]: Without dead ends: 421 [2020-10-14 05:26:23,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:26:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-14 05:26:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 368. [2020-10-14 05:26:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-14 05:26:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 456 transitions. [2020-10-14 05:26:23,102 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 456 transitions. Word has length 38 [2020-10-14 05:26:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:23,103 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 456 transitions. [2020-10-14 05:26:23,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:26:23,103 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 456 transitions. [2020-10-14 05:26:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:26:23,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:23,104 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:23,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:26:23,104 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:23,105 INFO L82 PathProgramCache]: Analyzing trace with hash -357608435, now seen corresponding path program 36 times [2020-10-14 05:26:23,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:23,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744038707] [2020-10-14 05:26:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:23,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:23,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:23,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:23,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:26,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:28,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:26:28,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:26:28,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:26:28,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:28,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:26:28,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:26:28,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:26:28,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:28,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:28,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:28,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:28,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:28,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:28,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:28,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:28,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:28,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:28,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:28,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 05:26:28,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744038707] [2020-10-14 05:26:28,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:28,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:26:28,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517908591] [2020-10-14 05:26:28,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:26:28,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:28,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:26:28,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:28,257 INFO L87 Difference]: Start difference. First operand 368 states and 456 transitions. Second operand 11 states. [2020-10-14 05:26:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:28,452 INFO L93 Difference]: Finished difference Result 426 states and 545 transitions. [2020-10-14 05:26:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:26:28,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-14 05:26:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:28,454 INFO L225 Difference]: With dead ends: 426 [2020-10-14 05:26:28,455 INFO L226 Difference]: Without dead ends: 420 [2020-10-14 05:26:28,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-10-14 05:26:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 387. [2020-10-14 05:26:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-14 05:26:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 483 transitions. [2020-10-14 05:26:28,476 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 483 transitions. Word has length 38 [2020-10-14 05:26:28,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:28,476 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 483 transitions. [2020-10-14 05:26:28,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:26:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 483 transitions. [2020-10-14 05:26:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:26:28,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:28,478 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:28,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:26:28,478 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:28,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:28,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2049757073, now seen corresponding path program 37 times [2020-10-14 05:26:28,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:28,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115617930] [2020-10-14 05:26:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:28,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:29,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:32,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:32,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:26:32,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:32,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4039 [2020-10-14 05:26:32,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:32,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:26:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 05:26:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:26:32,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:32,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:32,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:32,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:32,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:32,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:32,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:32,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:26:32,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115617930] [2020-10-14 05:26:32,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:32,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:26:32,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947201598] [2020-10-14 05:26:32,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:26:32,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:32,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:26:32,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:32,685 INFO L87 Difference]: Start difference. First operand 387 states and 483 transitions. Second operand 10 states. [2020-10-14 05:26:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:32,982 INFO L93 Difference]: Finished difference Result 587 states and 709 transitions. [2020-10-14 05:26:32,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:26:32,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-14 05:26:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:32,986 INFO L225 Difference]: With dead ends: 587 [2020-10-14 05:26:32,986 INFO L226 Difference]: Without dead ends: 564 [2020-10-14 05:26:32,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-14 05:26:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 403. [2020-10-14 05:26:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-14 05:26:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 505 transitions. [2020-10-14 05:26:33,008 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 505 transitions. Word has length 40 [2020-10-14 05:26:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:33,008 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 505 transitions. [2020-10-14 05:26:33,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:26:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 505 transitions. [2020-10-14 05:26:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:26:33,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:33,010 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:33,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:26:33,013 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1531164433, now seen corresponding path program 38 times [2020-10-14 05:26:33,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:33,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206127207] [2020-10-14 05:26:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:33,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:33,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:38,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:38,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:26:38,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:38,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:26:38,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:38,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:26:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:26:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:26:38,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:38,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:38,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:38,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:38,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:38,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:38,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:38,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:38,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:38,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:38,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:38,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:38,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:26:38,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206127207] [2020-10-14 05:26:38,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:38,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:26:38,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398102284] [2020-10-14 05:26:38,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:26:38,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:38,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:26:38,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:26:38,241 INFO L87 Difference]: Start difference. First operand 403 states and 505 transitions. Second operand 13 states. [2020-10-14 05:26:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:39,297 INFO L93 Difference]: Finished difference Result 529 states and 710 transitions. [2020-10-14 05:26:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:26:39,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-14 05:26:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:39,300 INFO L225 Difference]: With dead ends: 529 [2020-10-14 05:26:39,300 INFO L226 Difference]: Without dead ends: 498 [2020-10-14 05:26:39,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:26:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-10-14 05:26:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 444. [2020-10-14 05:26:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-10-14 05:26:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 556 transitions. [2020-10-14 05:26:39,322 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 556 transitions. Word has length 40 [2020-10-14 05:26:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:39,322 INFO L479 AbstractCegarLoop]: Abstraction has 444 states and 556 transitions. [2020-10-14 05:26:39,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:26:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 556 transitions. [2020-10-14 05:26:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:26:39,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:39,324 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:39,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:26:39,324 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:39,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1150387263, now seen corresponding path program 39 times [2020-10-14 05:26:39,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:39,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812012] [2020-10-14 05:26:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:39,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:39,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:39,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:40,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:42,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:44,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:44,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:26:44,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:26:44,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:26:44,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:44,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:44,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:44,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 05:26:44,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:26:44,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:44,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:44,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:44,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:44,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:44,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:44,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:44,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:44,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:44,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-14 05:26:44,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812012] [2020-10-14 05:26:44,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:44,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:44,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952542537] [2020-10-14 05:26:44,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:44,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:44,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:44,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:44,516 INFO L87 Difference]: Start difference. First operand 444 states and 556 transitions. Second operand 12 states. [2020-10-14 05:26:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:44,759 INFO L93 Difference]: Finished difference Result 518 states and 669 transitions. [2020-10-14 05:26:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:26:44,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-14 05:26:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:44,762 INFO L225 Difference]: With dead ends: 518 [2020-10-14 05:26:44,762 INFO L226 Difference]: Without dead ends: 512 [2020-10-14 05:26:44,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-10-14 05:26:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 465. [2020-10-14 05:26:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-10-14 05:26:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 586 transitions. [2020-10-14 05:26:44,783 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 586 transitions. Word has length 40 [2020-10-14 05:26:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:44,784 INFO L479 AbstractCegarLoop]: Abstraction has 465 states and 586 transitions. [2020-10-14 05:26:44,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:26:44,784 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 586 transitions. [2020-10-14 05:26:44,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:26:44,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:44,785 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:44,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:26:44,785 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2036483073, now seen corresponding path program 40 times [2020-10-14 05:26:44,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:44,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126558718] [2020-10-14 05:26:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:44,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:44,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:44,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:26:49,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:49,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:26:49,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:49,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:26:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:26:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:26:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:50,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:50,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:50,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:50,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:50,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:50,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:50,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:50,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:50,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:50,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:50,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:50,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:26:50,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126558718] [2020-10-14 05:26:50,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:50,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:26:50,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760766377] [2020-10-14 05:26:50,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:26:50,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:26:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:26:50,039 INFO L87 Difference]: Start difference. First operand 465 states and 586 transitions. Second operand 14 states. [2020-10-14 05:26:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:50,342 INFO L93 Difference]: Finished difference Result 611 states and 830 transitions. [2020-10-14 05:26:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:26:50,343 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-14 05:26:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:50,345 INFO L225 Difference]: With dead ends: 611 [2020-10-14 05:26:50,345 INFO L226 Difference]: Without dead ends: 578 [2020-10-14 05:26:50,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:26:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-10-14 05:26:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 508. [2020-10-14 05:26:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-14 05:26:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 640 transitions. [2020-10-14 05:26:50,367 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 640 transitions. Word has length 41 [2020-10-14 05:26:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:50,367 INFO L479 AbstractCegarLoop]: Abstraction has 508 states and 640 transitions. [2020-10-14 05:26:50,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:26:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 640 transitions. [2020-10-14 05:26:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:26:50,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:50,369 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:50,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:26:50,369 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:50,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1495998814, now seen corresponding path program 41 times [2020-10-14 05:26:50,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:50,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006776190] [2020-10-14 05:26:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:50,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:50,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:50,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:53,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:53,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:26:53,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:53,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3510 [2020-10-14 05:26:53,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:53,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:53,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:26:53,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:53,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:26:53,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:54,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:54,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:54,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:54,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:54,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:54,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:54,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:54,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:54,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:54,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:54,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:54,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-14 05:26:54,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006776190] [2020-10-14 05:26:54,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:54,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:26:54,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423693203] [2020-10-14 05:26:54,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:26:54,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:54,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:26:54,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:26:54,074 INFO L87 Difference]: Start difference. First operand 508 states and 640 transitions. Second operand 14 states. [2020-10-14 05:26:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:54,628 INFO L93 Difference]: Finished difference Result 653 states and 797 transitions. [2020-10-14 05:26:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:26:54,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-14 05:26:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:54,633 INFO L225 Difference]: With dead ends: 653 [2020-10-14 05:26:54,633 INFO L226 Difference]: Without dead ends: 629 [2020-10-14 05:26:54,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:26:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-10-14 05:26:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 501. [2020-10-14 05:26:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-10-14 05:26:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 632 transitions. [2020-10-14 05:26:54,653 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 632 transitions. Word has length 41 [2020-10-14 05:26:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:54,654 INFO L479 AbstractCegarLoop]: Abstraction has 501 states and 632 transitions. [2020-10-14 05:26:54,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:26:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 632 transitions. [2020-10-14 05:26:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:26:54,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:54,656 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:54,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:26:54,656 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash 888446398, now seen corresponding path program 42 times [2020-10-14 05:26:54,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:54,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944360786] [2020-10-14 05:26:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:54,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:54,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:55,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:59,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:26:59,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:59,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:26:59,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:59,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:59,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:26:59,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:59,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:26:59,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:59,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:59,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:59,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:59,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:59,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:59,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:59,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:59,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:59,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:59,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:59,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:59,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-14 05:26:59,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944360786] [2020-10-14 05:26:59,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:59,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:59,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199608669] [2020-10-14 05:26:59,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:59,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:59,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:59,818 INFO L87 Difference]: Start difference. First operand 501 states and 632 transitions. Second operand 12 states. [2020-10-14 05:27:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:00,125 INFO L93 Difference]: Finished difference Result 1109 states and 1392 transitions. [2020-10-14 05:27:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:27:00,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-14 05:27:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:00,129 INFO L225 Difference]: With dead ends: 1109 [2020-10-14 05:27:00,129 INFO L226 Difference]: Without dead ends: 943 [2020-10-14 05:27:00,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:27:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2020-10-14 05:27:00,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 597. [2020-10-14 05:27:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-10-14 05:27:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 738 transitions. [2020-10-14 05:27:00,149 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 738 transitions. Word has length 41 [2020-10-14 05:27:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:00,149 INFO L479 AbstractCegarLoop]: Abstraction has 597 states and 738 transitions. [2020-10-14 05:27:00,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:27:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 738 transitions. [2020-10-14 05:27:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:27:00,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:00,151 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:00,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:27:00,152 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1989197581, now seen corresponding path program 43 times [2020-10-14 05:27:00,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:00,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519118100] [2020-10-14 05:27:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:00,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:03,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:03,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:27:03,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:03,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2905 [2020-10-14 05:27:03,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:03,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:03,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:27:03,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:27:03,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:27:03,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:03,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:03,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:03,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:03,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:03,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:03,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:03,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:03,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:03,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:03,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:03,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:03,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-14 05:27:03,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519118100] [2020-10-14 05:27:03,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:03,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:27:03,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276984839] [2020-10-14 05:27:03,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:27:03,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:03,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:27:03,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:27:03,287 INFO L87 Difference]: Start difference. First operand 597 states and 738 transitions. Second operand 14 states. [2020-10-14 05:27:04,163 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-14 05:27:09,287 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-14 05:27:10,395 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-14 05:27:11,752 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-14 05:27:16,498 WARN L193 SmtUtils]: Spent 4.27 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-14 05:27:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:18,929 INFO L93 Difference]: Finished difference Result 848 states and 1018 transitions. [2020-10-14 05:27:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:27:18,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-14 05:27:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:18,935 INFO L225 Difference]: With dead ends: 848 [2020-10-14 05:27:18,935 INFO L226 Difference]: Without dead ends: 744 [2020-10-14 05:27:18,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=282, Invalid=1277, Unknown=1, NotChecked=0, Total=1560 [2020-10-14 05:27:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-14 05:27:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 504. [2020-10-14 05:27:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-14 05:27:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 610 transitions. [2020-10-14 05:27:18,961 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 610 transitions. Word has length 42 [2020-10-14 05:27:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:18,961 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 610 transitions. [2020-10-14 05:27:18,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:27:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 610 transitions. [2020-10-14 05:27:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:27:18,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:18,963 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:18,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:27:18,963 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash 901935757, now seen corresponding path program 44 times [2020-10-14 05:27:18,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:18,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361699610] [2020-10-14 05:27:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:18,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:19,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:19,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:23,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:23,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:23,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:27:23,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:27:23,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:27:23,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:23,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:23,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:27:23,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:27:23,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:27:23,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:24,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:24,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:24,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:24,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:24,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:24,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:24,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:24,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:24,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:24,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-14 05:27:24,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361699610] [2020-10-14 05:27:24,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:24,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:27:24,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483248076] [2020-10-14 05:27:24,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:27:24,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:24,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:27:24,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:27:24,212 INFO L87 Difference]: Start difference. First operand 504 states and 610 transitions. Second operand 13 states. [2020-10-14 05:27:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:25,789 INFO L93 Difference]: Finished difference Result 581 states and 728 transitions. [2020-10-14 05:27:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:27:25,790 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-14 05:27:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:25,793 INFO L225 Difference]: With dead ends: 581 [2020-10-14 05:27:25,793 INFO L226 Difference]: Without dead ends: 575 [2020-10-14 05:27:25,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:27:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-10-14 05:27:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 527. [2020-10-14 05:27:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-10-14 05:27:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 643 transitions. [2020-10-14 05:27:25,810 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 643 transitions. Word has length 42 [2020-10-14 05:27:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:25,811 INFO L479 AbstractCegarLoop]: Abstraction has 527 states and 643 transitions. [2020-10-14 05:27:25,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:27:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 643 transitions. [2020-10-14 05:27:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:27:25,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:25,812 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:25,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 05:27:25,813 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash 200318078, now seen corresponding path program 45 times [2020-10-14 05:27:25,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:25,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563625610] [2020-10-14 05:27:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:25,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:26,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:30,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:30,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:27:30,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:27:30,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:27:30,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:30,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:30,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:27:30,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:30,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:27:30,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:31,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:31,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:31,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:31,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:31,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:31,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:31,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:31,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:31,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:31,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:31,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:31,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-14 05:27:31,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563625610] [2020-10-14 05:27:31,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:31,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:27:31,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523381983] [2020-10-14 05:27:31,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:27:31,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:31,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:27:31,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:27:31,046 INFO L87 Difference]: Start difference. First operand 527 states and 643 transitions. Second operand 15 states. [2020-10-14 05:27:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:31,534 INFO L93 Difference]: Finished difference Result 617 states and 739 transitions. [2020-10-14 05:27:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:27:31,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-14 05:27:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:31,537 INFO L225 Difference]: With dead ends: 617 [2020-10-14 05:27:31,537 INFO L226 Difference]: Without dead ends: 592 [2020-10-14 05:27:31,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:27:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-10-14 05:27:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 520. [2020-10-14 05:27:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-10-14 05:27:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 635 transitions. [2020-10-14 05:27:31,561 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 635 transitions. Word has length 43 [2020-10-14 05:27:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:31,561 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 635 transitions. [2020-10-14 05:27:31,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:27:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 635 transitions. [2020-10-14 05:27:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:27:31,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:31,563 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:31,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 05:27:31,563 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:31,564 INFO L82 PathProgramCache]: Analyzing trace with hash 498868528, now seen corresponding path program 46 times [2020-10-14 05:27:31,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:31,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831031308] [2020-10-14 05:27:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:31,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:31,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:31,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:32,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:33,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:36,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:36,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:27:36,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:27:36,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 05:27:36,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:36,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:27:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:27:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:27:36,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:36,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:36,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:36,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:36,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:36,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:36,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:36,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:36,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:36,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-14 05:27:36,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831031308] [2020-10-14 05:27:36,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:36,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:27:36,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247315987] [2020-10-14 05:27:36,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:27:36,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:27:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:27:36,839 INFO L87 Difference]: Start difference. First operand 520 states and 635 transitions. Second operand 14 states. [2020-10-14 05:27:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:39,394 INFO L93 Difference]: Finished difference Result 598 states and 755 transitions. [2020-10-14 05:27:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:27:39,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-14 05:27:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:39,397 INFO L225 Difference]: With dead ends: 598 [2020-10-14 05:27:39,398 INFO L226 Difference]: Without dead ends: 592 [2020-10-14 05:27:39,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:27:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-10-14 05:27:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 543. [2020-10-14 05:27:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-10-14 05:27:39,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 668 transitions. [2020-10-14 05:27:39,415 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 668 transitions. Word has length 43 [2020-10-14 05:27:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:39,415 INFO L479 AbstractCegarLoop]: Abstraction has 543 states and 668 transitions. [2020-10-14 05:27:39,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:27:39,415 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 668 transitions. [2020-10-14 05:27:39,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:27:39,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:39,417 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:39,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 05:27:39,417 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash 579628333, now seen corresponding path program 47 times [2020-10-14 05:27:39,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:39,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674888167] [2020-10-14 05:27:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:39,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:39,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:40,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:43,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:43,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:27:43,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:27:43,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3682 [2020-10-14 05:27:43,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:43,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:43,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:27:43,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:43,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:27:43,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:43,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:43,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:43,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:43,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:43,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:43,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:43,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:43,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:43,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-14 05:27:43,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674888167] [2020-10-14 05:27:43,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:43,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:27:43,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548666098] [2020-10-14 05:27:43,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:27:43,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:27:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:27:43,360 INFO L87 Difference]: Start difference. First operand 543 states and 668 transitions. Second operand 15 states. [2020-10-14 05:27:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:44,283 INFO L93 Difference]: Finished difference Result 708 states and 848 transitions. [2020-10-14 05:27:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:27:44,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-14 05:27:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:44,288 INFO L225 Difference]: With dead ends: 708 [2020-10-14 05:27:44,288 INFO L226 Difference]: Without dead ends: 682 [2020-10-14 05:27:44,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:27:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-10-14 05:27:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 535. [2020-10-14 05:27:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-14 05:27:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 659 transitions. [2020-10-14 05:27:44,329 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 659 transitions. Word has length 44 [2020-10-14 05:27:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:44,329 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 659 transitions. [2020-10-14 05:27:44,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:27:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 659 transitions. [2020-10-14 05:27:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:27:44,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:44,332 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:44,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 05:27:44,332 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash -731123635, now seen corresponding path program 48 times [2020-10-14 05:27:44,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:44,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322775075] [2020-10-14 05:27:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:44,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:44,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:44,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:45,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:49,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:49,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:27:49,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:27:49,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 05:27:49,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:49,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:49,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:27:49,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:27:49,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:27:49,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:49,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:49,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:49,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:49,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:49,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:49,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:49,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:49,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:49,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:49,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:49,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:49,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-14 05:27:49,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322775075] [2020-10-14 05:27:49,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:49,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:27:49,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255864703] [2020-10-14 05:27:49,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:27:49,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:27:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:27:49,531 INFO L87 Difference]: Start difference. First operand 535 states and 659 transitions. Second operand 12 states. [2020-10-14 05:27:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:49,913 INFO L93 Difference]: Finished difference Result 817 states and 974 transitions. [2020-10-14 05:27:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:27:49,915 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-14 05:27:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:49,918 INFO L225 Difference]: With dead ends: 817 [2020-10-14 05:27:49,918 INFO L226 Difference]: Without dead ends: 737 [2020-10-14 05:27:49,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:27:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2020-10-14 05:27:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 503. [2020-10-14 05:27:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-10-14 05:27:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 618 transitions. [2020-10-14 05:27:49,938 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 618 transitions. Word has length 44 [2020-10-14 05:27:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:49,939 INFO L479 AbstractCegarLoop]: Abstraction has 503 states and 618 transitions. [2020-10-14 05:27:49,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:27:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 618 transitions. [2020-10-14 05:27:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:27:49,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:49,940 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:49,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 05:27:49,941 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash -296851106, now seen corresponding path program 49 times [2020-10-14 05:27:49,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:49,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433604250] [2020-10-14 05:27:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:49,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:50,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:53,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:54,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:54,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:27:54,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:27:54,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4997 [2020-10-14 05:27:54,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:54,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:54,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:27:54,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 05:27:54,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:27:54,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:55,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:55,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:55,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:55,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:55,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:55,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:55,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:55,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:55,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:55,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:55,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:55,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-14 05:27:55,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433604250] [2020-10-14 05:27:55,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:55,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:27:55,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324542335] [2020-10-14 05:27:55,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:27:55,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:55,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:27:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:27:55,098 INFO L87 Difference]: Start difference. First operand 503 states and 618 transitions. Second operand 11 states. [2020-10-14 05:27:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:55,428 INFO L93 Difference]: Finished difference Result 842 states and 1000 transitions. [2020-10-14 05:27:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:27:55,429 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-14 05:27:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:55,433 INFO L225 Difference]: With dead ends: 842 [2020-10-14 05:27:55,433 INFO L226 Difference]: Without dead ends: 816 [2020-10-14 05:27:55,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:27:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-14 05:27:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 521. [2020-10-14 05:27:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-14 05:27:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 643 transitions. [2020-10-14 05:27:55,450 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 643 transitions. Word has length 45 [2020-10-14 05:27:55,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:55,451 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 643 transitions. [2020-10-14 05:27:55,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:27:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 643 transitions. [2020-10-14 05:27:55,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:27:55,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:55,452 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:55,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 05:27:55,453 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2147109250, now seen corresponding path program 50 times [2020-10-14 05:27:55,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:55,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118894683] [2020-10-14 05:27:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:55,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:55,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:55,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:00,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:00,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:28:00,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:00,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:28:00,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:00,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:00,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:28:00,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:28:00,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:28:00,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:00,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:00,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:00,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:00,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:00,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:00,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:00,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:00,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:00,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-14 05:28:00,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118894683] [2020-10-14 05:28:00,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:00,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:28:00,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960700949] [2020-10-14 05:28:00,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:28:00,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:00,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:28:00,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:28:00,775 INFO L87 Difference]: Start difference. First operand 521 states and 643 transitions. Second operand 15 states. [2020-10-14 05:28:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:01,148 INFO L93 Difference]: Finished difference Result 683 states and 912 transitions. [2020-10-14 05:28:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:28:01,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-14 05:28:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:01,152 INFO L225 Difference]: With dead ends: 683 [2020-10-14 05:28:01,152 INFO L226 Difference]: Without dead ends: 646 [2020-10-14 05:28:01,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:28:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-14 05:28:01,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 569. [2020-10-14 05:28:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-14 05:28:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 702 transitions. [2020-10-14 05:28:01,170 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 702 transitions. Word has length 45 [2020-10-14 05:28:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:01,170 INFO L479 AbstractCegarLoop]: Abstraction has 569 states and 702 transitions. [2020-10-14 05:28:01,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:28:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 702 transitions. [2020-10-14 05:28:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:28:01,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:01,171 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:01,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 05:28:01,172 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1601529586, now seen corresponding path program 51 times [2020-10-14 05:28:01,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:01,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036597762] [2020-10-14 05:28:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:01,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:01,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:06,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:06,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:28:06,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:06,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 05:28:06,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:06,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:06,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:28:06,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:28:06,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:28:06,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:06,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:06,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:06,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:06,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:06,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:06,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:06,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:06,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:06,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:06,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:06,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-14 05:28:06,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036597762] [2020-10-14 05:28:06,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:06,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:28:06,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458267231] [2020-10-14 05:28:06,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:28:06,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:06,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:28:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:28:06,531 INFO L87 Difference]: Start difference. First operand 569 states and 702 transitions. Second operand 16 states. [2020-10-14 05:28:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:06,951 INFO L93 Difference]: Finished difference Result 738 states and 985 transitions. [2020-10-14 05:28:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:28:06,951 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-14 05:28:06,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:06,954 INFO L225 Difference]: With dead ends: 738 [2020-10-14 05:28:06,954 INFO L226 Difference]: Without dead ends: 701 [2020-10-14 05:28:06,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:28:06,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-10-14 05:28:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 617. [2020-10-14 05:28:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-14 05:28:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 761 transitions. [2020-10-14 05:28:06,981 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 761 transitions. Word has length 46 [2020-10-14 05:28:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:06,981 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 761 transitions. [2020-10-14 05:28:06,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:28:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 761 transitions. [2020-10-14 05:28:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:28:06,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:06,983 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:06,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 05:28:06,983 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash 764872335, now seen corresponding path program 52 times [2020-10-14 05:28:06,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:06,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337291239] [2020-10-14 05:28:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:07,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:07,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:07,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:12,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:12,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:28:12,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:12,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:28:12,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:12,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:28:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:28:12,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:12,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:12,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:12,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:12,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:12,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:12,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:12,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:12,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:12,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:12,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-14 05:28:12,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337291239] [2020-10-14 05:28:12,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:12,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:28:12,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319107550] [2020-10-14 05:28:12,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:28:12,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:12,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:28:12,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:28:12,315 INFO L87 Difference]: Start difference. First operand 617 states and 761 transitions. Second operand 16 states. [2020-10-14 05:28:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:13,339 INFO L93 Difference]: Finished difference Result 802 states and 960 transitions. [2020-10-14 05:28:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:28:13,342 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-14 05:28:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:13,346 INFO L225 Difference]: With dead ends: 802 [2020-10-14 05:28:13,347 INFO L226 Difference]: Without dead ends: 775 [2020-10-14 05:28:13,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:28:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-14 05:28:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 609. [2020-10-14 05:28:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2020-10-14 05:28:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 752 transitions. [2020-10-14 05:28:13,383 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 752 transitions. Word has length 46 [2020-10-14 05:28:13,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:13,383 INFO L479 AbstractCegarLoop]: Abstraction has 609 states and 752 transitions. [2020-10-14 05:28:13,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:28:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 752 transitions. [2020-10-14 05:28:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:28:13,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:13,386 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:13,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 05:28:13,387 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:13,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1170642003, now seen corresponding path program 53 times [2020-10-14 05:28:13,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:13,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815334583] [2020-10-14 05:28:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:13,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:13,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:13,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:14,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:18,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:18,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:28:18,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:28:18,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:28:18,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:18,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:28:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:28:18,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:18,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:18,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:18,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:18,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:18,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:18,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:18,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:18,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-14 05:28:18,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815334583] [2020-10-14 05:28:18,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:18,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:28:18,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442086055] [2020-10-14 05:28:18,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:28:18,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:18,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:28:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:28:18,631 INFO L87 Difference]: Start difference. First operand 609 states and 752 transitions. Second operand 13 states. [2020-10-14 05:28:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:19,307 INFO L93 Difference]: Finished difference Result 1358 states and 1667 transitions. [2020-10-14 05:28:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:28:19,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-14 05:28:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:19,312 INFO L225 Difference]: With dead ends: 1358 [2020-10-14 05:28:19,313 INFO L226 Difference]: Without dead ends: 1161 [2020-10-14 05:28:19,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:28:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2020-10-14 05:28:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 726. [2020-10-14 05:28:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726 states. [2020-10-14 05:28:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 880 transitions. [2020-10-14 05:28:19,371 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 880 transitions. Word has length 46 [2020-10-14 05:28:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:19,372 INFO L479 AbstractCegarLoop]: Abstraction has 726 states and 880 transitions. [2020-10-14 05:28:19,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:28:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 880 transitions. [2020-10-14 05:28:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:28:19,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:19,374 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:19,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 05:28:19,375 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1186274430, now seen corresponding path program 54 times [2020-10-14 05:28:19,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:19,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077049870] [2020-10-14 05:28:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:19,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:19,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:24,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:24,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:28:24,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:24,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 05:28:24,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:24,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:28:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:28:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:28:24,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:24,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:24,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:24,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:24,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:24,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:24,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:24,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:24,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:24,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:24,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:24,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-14 05:28:24,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077049870] [2020-10-14 05:28:24,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:24,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:28:24,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154371827] [2020-10-14 05:28:24,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:28:24,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:24,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:28:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:28:24,711 INFO L87 Difference]: Start difference. First operand 726 states and 880 transitions. Second operand 16 states. [2020-10-14 05:28:28,981 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-14 05:28:33,684 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-14 05:28:34,569 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-14 05:28:35,475 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-14 05:28:41,537 WARN L193 SmtUtils]: Spent 5.53 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-14 05:28:49,209 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-14 05:28:53,621 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-14 05:28:53,936 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-14 05:28:56,776 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 41