/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:57:53,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:57:53,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:57:53,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:57:53,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:57:53,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:57:53,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:57:53,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:57:53,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:57:53,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:57:53,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:57:53,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:57:53,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:57:53,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:57:53,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:57:53,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:57:53,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:57:53,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:57:53,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:57:53,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:57:53,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:57:53,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:57:53,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:57:53,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:57:53,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:57:53,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:57:53,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:57:53,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:57:53,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:57:53,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:57:53,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:57:53,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:57:53,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:57:53,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:57:53,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:57:53,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:57:53,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:57:53,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:57:53,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:57:53,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:57:53,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:57:53,654 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 23:57:53,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:57:53,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:57:53,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:57:53,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:57:53,703 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:57:53,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:57:53,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:57:53,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:57:53,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:57:53,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:57:53,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:57:53,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:57:53,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:57:53,706 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:57:53,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:57:53,706 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:57:53,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:57:53,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:57:53,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:57:53,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:57:53,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:57:53,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:57:53,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:57:53,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:57:53,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:57:53,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:57:53,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:57:53,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:57:53,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:57:53,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:57:54,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:57:54,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:57:54,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:57:54,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:57:54,044 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:57:54,045 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-14 23:57:54,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9113b17c1/302f98e43b054e5cb04de9ba99640d72/FLAG88ee4076c [2020-10-14 23:57:54,551 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:57:54,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-14 23:57:54,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9113b17c1/302f98e43b054e5cb04de9ba99640d72/FLAG88ee4076c [2020-10-14 23:57:54,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9113b17c1/302f98e43b054e5cb04de9ba99640d72 [2020-10-14 23:57:54,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:57:54,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:57:54,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:57:54,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:57:54,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:57:54,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:54" (1/1) ... [2020-10-14 23:57:54,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:54, skipping insertion in model container [2020-10-14 23:57:54,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:54" (1/1) ... [2020-10-14 23:57:54,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:57:54,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:57:55,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:57:55,181 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:57:55,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:57:55,215 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:57:55,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55 WrapperNode [2020-10-14 23:57:55,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:57:55,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:57:55,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:57:55,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:57:55,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55" (1/1) ... [2020-10-14 23:57:55,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55" (1/1) ... [2020-10-14 23:57:55,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55" (1/1) ... [2020-10-14 23:57:55,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55" (1/1) ... [2020-10-14 23:57:55,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55" (1/1) ... [2020-10-14 23:57:55,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55" (1/1) ... [2020-10-14 23:57:55,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55" (1/1) ... [2020-10-14 23:57:55,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:57:55,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:57:55,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:57:55,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:57:55,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55" (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 23:57:55,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:57:55,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:57:55,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:57:55,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:57:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:57:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 23:57:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:57:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:57:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:57:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:57:55,628 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:57:55,628 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 23:57:55,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:55 BoogieIcfgContainer [2020-10-14 23:57:55,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:57:55,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:57:55,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:57:55,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:57:55,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:57:54" (1/3) ... [2020-10-14 23:57:55,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38731f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:55, skipping insertion in model container [2020-10-14 23:57:55,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:55" (2/3) ... [2020-10-14 23:57:55,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38731f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:55, skipping insertion in model container [2020-10-14 23:57:55,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:55" (3/3) ... [2020-10-14 23:57:55,640 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de51.c [2020-10-14 23:57:55,651 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:57:55,658 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:57:55,673 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:57:55,723 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:57:55,724 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:57:55,724 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:57:55,724 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:57:55,724 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:57:55,724 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:57:55,725 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:57:55,725 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:57:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-14 23:57:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:57:55,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:55,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:55,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash -255424134, now seen corresponding path program 1 times [2020-10-14 23:57:55,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:55,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240805110] [2020-10-14 23:57:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:56,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:57:56,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-14 23:57:56,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:56,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:57:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:57:56,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 23:57:56,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:56,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:56,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:56,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 23:57:56,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:56,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:56,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:56,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:56,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:56,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:57:56,282 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 23:57:56,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240805110] [2020-10-14 23:57:56,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:56,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:57:56,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681309804] [2020-10-14 23:57:56,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:57:56,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:56,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:57:56,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:56,315 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-10-14 23:57:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:56,464 INFO L93 Difference]: Finished difference Result 54 states and 85 transitions. [2020-10-14 23:57:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:56,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 23:57:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:56,475 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:57:56,476 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:57:56,481 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 23:57:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:57:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 23:57:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:57:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2020-10-14 23:57:56,518 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 15 [2020-10-14 23:57:56,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:56,518 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2020-10-14 23:57:56,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:57:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2020-10-14 23:57:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:57:56,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:56,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:56,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:57:56,520 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:56,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1439862098, now seen corresponding path program 1 times [2020-10-14 23:57:56,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:56,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089872852] [2020-10-14 23:57:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:56,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:56,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:57:56,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:56,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-14 23:57:56,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:56,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:56,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:57:56,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:56,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:57:56,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:56,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:56,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:56,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:56,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:57:56,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:56,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:56,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:56,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:56,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:56,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:57:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:56,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089872852] [2020-10-14 23:57:56,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:56,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:57:56,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144535721] [2020-10-14 23:57:56,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:57:56,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:56,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:57:56,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:56,972 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand 7 states. [2020-10-14 23:57:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:57,235 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2020-10-14 23:57:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:57:57,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-14 23:57:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:57,238 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:57:57,239 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:57:57,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:57:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:57:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-14 23:57:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:57:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-14 23:57:57,249 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 16 [2020-10-14 23:57:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:57,250 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-14 23:57:57,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:57:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-14 23:57:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:57:57,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:57,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:57,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:57:57,252 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1452276799, now seen corresponding path program 1 times [2020-10-14 23:57:57,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:57,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210150391] [2020-10-14 23:57:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:57,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:57:57,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:57,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-14 23:57:57,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:57,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:57,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:57:57,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:57:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:57:57,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:57,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:57,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:57,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:57,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:57,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:57,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:57,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:57,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:57,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:57,432 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 23:57:57,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210150391] [2020-10-14 23:57:57,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:57,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:57:57,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675440114] [2020-10-14 23:57:57,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:57:57,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:57:57,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:57,434 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 4 states. [2020-10-14 23:57:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:57,481 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2020-10-14 23:57:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:57:57,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 23:57:57,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:57,482 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:57:57,482 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 23:57:57,483 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 23:57:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 23:57:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 23:57:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:57:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-10-14 23:57:57,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2020-10-14 23:57:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:57,489 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-10-14 23:57:57,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:57:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-10-14 23:57:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:57:57,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:57,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:57,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:57:57,490 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash -436127603, now seen corresponding path program 1 times [2020-10-14 23:57:57,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:57,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726137519] [2020-10-14 23:57:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:57,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:57:57,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:57,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-14 23:57:57,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:57,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:57,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:57:57,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:57,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:57,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:57,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:57,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:57,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:57,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:57,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:57,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:57,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:57,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:57,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:57,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:57,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726137519] [2020-10-14 23:57:57,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:57,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:57:57,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137066764] [2020-10-14 23:57:57,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:57:57,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:57,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:57:57,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:57,733 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2020-10-14 23:57:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:57,814 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2020-10-14 23:57:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:57:57,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 23:57:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:57,816 INFO L225 Difference]: With dead ends: 37 [2020-10-14 23:57:57,816 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:57:57,816 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 23:57:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:57:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-14 23:57:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:57:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-10-14 23:57:57,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 16 [2020-10-14 23:57:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:57,823 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-10-14 23:57:57,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:57:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-10-14 23:57:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:57:57,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:57,824 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:57,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:57:57,825 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1807046878, now seen corresponding path program 2 times [2020-10-14 23:57:57,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:57,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429754484] [2020-10-14 23:57:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:57:58,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:58,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-14 23:57:58,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:57:58,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:58,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:57:58,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:58,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:58,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:58,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:58,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:57:58,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:58,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:58,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:58,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:58,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429754484] [2020-10-14 23:57:58,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:58,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:57:58,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351498067] [2020-10-14 23:57:58,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:57:58,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:57:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:58,205 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 6 states. [2020-10-14 23:57:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:58,314 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2020-10-14 23:57:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:58,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-14 23:57:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:58,316 INFO L225 Difference]: With dead ends: 47 [2020-10-14 23:57:58,316 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 23:57:58,316 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 23:57:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 23:57:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2020-10-14 23:57:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 23:57:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-14 23:57:58,323 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 17 [2020-10-14 23:57:58,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:58,323 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-14 23:57:58,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:57:58,323 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-14 23:57:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:57:58,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:58,324 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 23:57:58,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:57:58,325 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2058308578, now seen corresponding path program 1 times [2020-10-14 23:57:58,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:58,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891937632] [2020-10-14 23:57:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:58,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:57:58,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:57:58,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-14 23:57:58,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:57:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:58,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:58,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:58,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:58,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:58,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:58,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:58,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:58,691 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 23:57:58,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891937632] [2020-10-14 23:57:58,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:58,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:57:58,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779537929] [2020-10-14 23:57:58,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:57:58,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:58,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:57:58,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:58,694 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 7 states. [2020-10-14 23:57:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:58,808 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-10-14 23:57:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:58,810 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 23:57:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:58,811 INFO L225 Difference]: With dead ends: 41 [2020-10-14 23:57:58,812 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:57:58,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:57:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:57:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 23:57:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:57:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-10-14 23:57:58,827 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 18 [2020-10-14 23:57:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:58,827 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-10-14 23:57:58,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:57:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-10-14 23:57:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:57:58,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:58,831 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:58,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:57:58,831 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:58,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1668988243, now seen corresponding path program 3 times [2020-10-14 23:57:58,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:58,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840027370] [2020-10-14 23:57:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:58,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:57:59,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:59,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-14 23:57:59,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:57:59,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:59,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:59,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:59,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:59,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:59,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:59,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:59,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840027370] [2020-10-14 23:57:59,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:59,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:57:59,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857368348] [2020-10-14 23:57:59,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:57:59,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:59,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:57:59,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:59,132 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 6 states. [2020-10-14 23:57:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:59,207 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2020-10-14 23:57:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:59,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-14 23:57:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:59,208 INFO L225 Difference]: With dead ends: 59 [2020-10-14 23:57:59,208 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:57:59,209 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 23:57:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:57:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2020-10-14 23:57:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:57:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-10-14 23:57:59,215 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 18 [2020-10-14 23:57:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:59,216 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-10-14 23:57:59,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:57:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-10-14 23:57:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:57:59,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:59,217 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 23:57:59,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:57:59,218 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:59,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2055309710, now seen corresponding path program 1 times [2020-10-14 23:57:59,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:59,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152495839] [2020-10-14 23:57:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:57:59,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:59,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-14 23:57:59,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:57:59,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:57:59,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:57:59,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:59,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:59,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:59,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:59,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:59,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:59,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:57:59,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152495839] [2020-10-14 23:57:59,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:59,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:57:59,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371249047] [2020-10-14 23:57:59,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:57:59,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:59,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:57:59,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:59,354 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 4 states. [2020-10-14 23:57:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:59,384 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-10-14 23:57:59,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:57:59,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 23:57:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:59,386 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:57:59,386 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:57:59,386 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 23:57:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:57:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-14 23:57:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:57:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-10-14 23:57:59,393 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2020-10-14 23:57:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:59,393 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-10-14 23:57:59,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:57:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-10-14 23:57:59,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:57:59,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:59,395 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 23:57:59,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:57:59,395 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:59,396 INFO L82 PathProgramCache]: Analyzing trace with hash 652481311, now seen corresponding path program 1 times [2020-10-14 23:57:59,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:59,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470884385] [2020-10-14 23:57:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:57:59,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-14 23:57:59,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:57:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:57:59,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:59,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:59,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:59,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:59,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:57:59,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470884385] [2020-10-14 23:57:59,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:59,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:57:59,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738303355] [2020-10-14 23:57:59,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:57:59,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:59,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:57:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:59,785 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 9 states. [2020-10-14 23:58:00,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:00,000 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2020-10-14 23:58:00,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:58:00,001 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-14 23:58:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:00,002 INFO L225 Difference]: With dead ends: 63 [2020-10-14 23:58:00,002 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:58:00,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:58:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-14 23:58:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:58:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-10-14 23:58:00,017 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 19 [2020-10-14 23:58:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:00,018 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-10-14 23:58:00,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:58:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-10-14 23:58:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:58:00,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:00,019 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:00,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:58:00,019 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:00,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2051894594, now seen corresponding path program 4 times [2020-10-14 23:58:00,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:00,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128109673] [2020-10-14 23:58:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:00,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:58:00,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:00,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-14 23:58:00,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:00,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:00,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:58:00,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:00,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:58:00,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:00,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:00,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:00,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:00,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:00,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:00,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:00,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:00,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:00,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:00,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:00,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:00,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128109673] [2020-10-14 23:58:00,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:00,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:00,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284317709] [2020-10-14 23:58:00,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:00,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:00,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:00,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:00,388 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 7 states. [2020-10-14 23:58:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:00,489 INFO L93 Difference]: Finished difference Result 96 states and 137 transitions. [2020-10-14 23:58:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:00,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-14 23:58:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:00,491 INFO L225 Difference]: With dead ends: 96 [2020-10-14 23:58:00,491 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 23:58:00,492 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 23:58:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 23:58:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2020-10-14 23:58:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2020-10-14 23:58:00,504 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 19 [2020-10-14 23:58:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:00,506 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2020-10-14 23:58:00,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2020-10-14 23:58:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:58:00,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:00,508 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 23:58:00,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:58:00,508 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash -686845170, now seen corresponding path program 2 times [2020-10-14 23:58:00,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:00,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516605226] [2020-10-14 23:58:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:01,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:01,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:58:01,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:58:01,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-14 23:58:01,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:01,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:58:01,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:01,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:01,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:01,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:01,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:01,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:01,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:01,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:01,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:01,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:01,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:01,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:01,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516605226] [2020-10-14 23:58:01,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:01,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:01,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377910333] [2020-10-14 23:58:01,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:01,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:01,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:01,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:01,518 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand 8 states. [2020-10-14 23:58:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:01,657 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2020-10-14 23:58:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:01,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 23:58:01,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:01,658 INFO L225 Difference]: With dead ends: 83 [2020-10-14 23:58:01,658 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 23:58:01,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 23:58:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-10-14 23:58:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:58:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-10-14 23:58:01,665 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 20 [2020-10-14 23:58:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:01,665 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-10-14 23:58:01,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-10-14 23:58:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:58:01,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:01,667 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:01,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:58:01,667 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:01,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1037089587, now seen corresponding path program 5 times [2020-10-14 23:58:01,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:01,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494805227] [2020-10-14 23:58:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:01,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:01,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:02,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:58:02,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:02,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-14 23:58:02,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:02,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:02,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:02,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:02,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:58:02,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:02,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:02,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:02,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:02,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:02,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:02,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:02,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:02,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:02,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:02,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:02,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:02,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494805227] [2020-10-14 23:58:02,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:02,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:02,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311851940] [2020-10-14 23:58:02,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:02,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:02,162 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 8 states. [2020-10-14 23:58:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:02,290 INFO L93 Difference]: Finished difference Result 108 states and 155 transitions. [2020-10-14 23:58:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:02,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 23:58:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:02,292 INFO L225 Difference]: With dead ends: 108 [2020-10-14 23:58:02,292 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:58:02,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 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 23:58:02,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:58:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 56. [2020-10-14 23:58:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 23:58:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2020-10-14 23:58:02,301 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 20 [2020-10-14 23:58:02,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:02,301 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2020-10-14 23:58:02,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:02,302 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2020-10-14 23:58:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:58:02,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:02,303 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 23:58:02,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:58:02,303 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash 604884398, now seen corresponding path program 1 times [2020-10-14 23:58:02,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:02,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605608462] [2020-10-14 23:58:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:02,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:02,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:58:02,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:02,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-14 23:58:02,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:02,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:02,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:02,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:02,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:02,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:02,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:02,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:02,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:02,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:02,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:02,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:02,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605608462] [2020-10-14 23:58:02,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:02,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:58:02,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786951678] [2020-10-14 23:58:02,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:58:02,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:02,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:58:02,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:02,672 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand 6 states. [2020-10-14 23:58:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:02,756 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2020-10-14 23:58:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:02,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 23:58:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:02,757 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:58:02,757 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 23:58:02,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:58:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 23:58:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-14 23:58:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:58:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2020-10-14 23:58:02,767 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 21 [2020-10-14 23:58:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:02,768 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2020-10-14 23:58:02,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:58:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2020-10-14 23:58:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:58:02,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:02,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:02,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:58:02,772 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:02,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1119782654, now seen corresponding path program 3 times [2020-10-14 23:58:02,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:02,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356632598] [2020-10-14 23:58:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:02,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:03,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:03,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:03,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:58:03,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:03,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-14 23:58:03,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:03,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:58:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:58:03,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:03,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:03,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:03,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:03,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:03,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:03,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:03,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:03,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:03,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:03,595 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 23:58:03,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356632598] [2020-10-14 23:58:03,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:03,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:03,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780069516] [2020-10-14 23:58:03,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:03,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:03,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:03,597 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 8 states. [2020-10-14 23:58:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:03,730 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2020-10-14 23:58:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:03,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-14 23:58:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:03,731 INFO L225 Difference]: With dead ends: 61 [2020-10-14 23:58:03,731 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:58:03,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:58:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:58:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-14 23:58:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:58:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 75 transitions. [2020-10-14 23:58:03,737 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 75 transitions. Word has length 21 [2020-10-14 23:58:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:03,737 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 75 transitions. [2020-10-14 23:58:03,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2020-10-14 23:58:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:58:03,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:03,738 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:03,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:58:03,739 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1746566128, now seen corresponding path program 1 times [2020-10-14 23:58:03,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:03,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983452215] [2020-10-14 23:58:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:03,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:03,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:03,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:03,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:03,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:04,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:58:04,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:04,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-14 23:58:04,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:04,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:04,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:58:04,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:04,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:58:04,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:04,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:04,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:04,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:04,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:04,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:04,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:04,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:04,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:04,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983452215] [2020-10-14 23:58:04,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:04,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:04,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280266596] [2020-10-14 23:58:04,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:04,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:04,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:04,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:04,313 INFO L87 Difference]: Start difference. First operand 53 states and 75 transitions. Second operand 10 states. [2020-10-14 23:58:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:04,466 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2020-10-14 23:58:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:04,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 23:58:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:04,467 INFO L225 Difference]: With dead ends: 85 [2020-10-14 23:58:04,467 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 23:58:04,468 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 23:58:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 23:58:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2020-10-14 23:58:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:58:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2020-10-14 23:58:04,473 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 21 [2020-10-14 23:58:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:04,473 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2020-10-14 23:58:04,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2020-10-14 23:58:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:58:04,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:04,474 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:04,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:58:04,474 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash 357094558, now seen corresponding path program 6 times [2020-10-14 23:58:04,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:04,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048707302] [2020-10-14 23:58:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:04,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:58:04,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:04,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-14 23:58:04,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:04,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:58:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:04,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:04,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:04,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:04,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:04,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:04,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:04,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:04,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048707302] [2020-10-14 23:58:04,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:04,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:58:04,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044311938] [2020-10-14 23:58:04,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:58:04,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:58:04,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:58:04,921 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand 9 states. [2020-10-14 23:58:05,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:05,090 INFO L93 Difference]: Finished difference Result 100 states and 149 transitions. [2020-10-14 23:58:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:58:05,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-14 23:58:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:05,091 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:58:05,091 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 23:58:05,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:58:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 23:58:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2020-10-14 23:58:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 23:58:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2020-10-14 23:58:05,097 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 21 [2020-10-14 23:58:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:05,097 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2020-10-14 23:58:05,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:58:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2020-10-14 23:58:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:05,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:05,098 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:05,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:58:05,099 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:05,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:05,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1791890094, now seen corresponding path program 2 times [2020-10-14 23:58:05,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:05,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138161869] [2020-10-14 23:58:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:05,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:05,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:05,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-14 23:58:05,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:05,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:05,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:58:05,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:58:05,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:05,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:05,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:05,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:05,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:05,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:05,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:05,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:05,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:05,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:05,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:05,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:05,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:58:05,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138161869] [2020-10-14 23:58:05,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:05,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:58:05,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012540398] [2020-10-14 23:58:05,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:58:05,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:05,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:58:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:05,658 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand 5 states. [2020-10-14 23:58:05,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:05,771 INFO L93 Difference]: Finished difference Result 133 states and 199 transitions. [2020-10-14 23:58:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:05,772 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 23:58:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:05,773 INFO L225 Difference]: With dead ends: 133 [2020-10-14 23:58:05,773 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 23:58:05,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 23:58:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2020-10-14 23:58:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 23:58:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 144 transitions. [2020-10-14 23:58:05,781 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 144 transitions. Word has length 22 [2020-10-14 23:58:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:05,782 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 144 transitions. [2020-10-14 23:58:05,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:58:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 144 transitions. [2020-10-14 23:58:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:05,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:05,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:05,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:58:05,783 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:05,784 INFO L82 PathProgramCache]: Analyzing trace with hash 389061695, now seen corresponding path program 2 times [2020-10-14 23:58:05,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:05,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961450950] [2020-10-14 23:58:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:06,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:06,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:06,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-14 23:58:06,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:06,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:58:06,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:58:06,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:58:06,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:06,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:06,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:06,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:06,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:06,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:06,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:06,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:06,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:58:06,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961450950] [2020-10-14 23:58:06,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:06,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:58:06,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137708458] [2020-10-14 23:58:06,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:58:06,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:06,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:58:06,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:06,370 INFO L87 Difference]: Start difference. First operand 98 states and 144 transitions. Second operand 5 states. [2020-10-14 23:58:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:06,432 INFO L93 Difference]: Finished difference Result 138 states and 199 transitions. [2020-10-14 23:58:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:58:06,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 23:58:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:06,434 INFO L225 Difference]: With dead ends: 138 [2020-10-14 23:58:06,434 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 23:58:06,435 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 23:58:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 23:58:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2020-10-14 23:58:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 23:58:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 159 transitions. [2020-10-14 23:58:06,443 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 159 transitions. Word has length 22 [2020-10-14 23:58:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:06,443 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 159 transitions. [2020-10-14 23:58:06,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:58:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 159 transitions. [2020-10-14 23:58:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:06,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:06,444 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:06,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:58:06,444 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:06,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:06,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1290670350, now seen corresponding path program 4 times [2020-10-14 23:58:06,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:06,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164838874] [2020-10-14 23:58:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:06,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:07,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:07,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:07,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:07,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-14 23:58:07,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:07,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:07,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:58:07,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:58:07,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:58:07,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:07,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:07,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:07,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:07,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:07,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:07,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:07,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:07,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:07,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:58:07,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164838874] [2020-10-14 23:58:07,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:07,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:58:07,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664159509] [2020-10-14 23:58:07,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:58:07,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:58:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:07,500 INFO L87 Difference]: Start difference. First operand 114 states and 159 transitions. Second operand 6 states. [2020-10-14 23:58:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:07,638 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2020-10-14 23:58:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:58:07,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 23:58:07,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:07,640 INFO L225 Difference]: With dead ends: 157 [2020-10-14 23:58:07,640 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 23:58:07,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 23:58:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 126. [2020-10-14 23:58:07,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 23:58:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 174 transitions. [2020-10-14 23:58:07,649 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 174 transitions. Word has length 22 [2020-10-14 23:58:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:07,650 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 174 transitions. [2020-10-14 23:58:07,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:58:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 174 transitions. [2020-10-14 23:58:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:07,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:07,651 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:07,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:58:07,651 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:07,652 INFO L82 PathProgramCache]: Analyzing trace with hash 627130093, now seen corresponding path program 7 times [2020-10-14 23:58:07,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:07,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330522723] [2020-10-14 23:58:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:07,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:07,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:07,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:07,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:07,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:07,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:07,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-14 23:58:07,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:07,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:07,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:58:07,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:07,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:07,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:08,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:08,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:08,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:08,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:08,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:08,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:08,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:08,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:08,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:08,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:08,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:08,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:08,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330522723] [2020-10-14 23:58:08,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:08,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:08,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348922323] [2020-10-14 23:58:08,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:08,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:08,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:08,061 INFO L87 Difference]: Start difference. First operand 126 states and 174 transitions. Second operand 10 states. [2020-10-14 23:58:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:08,279 INFO L93 Difference]: Finished difference Result 246 states and 359 transitions. [2020-10-14 23:58:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:58:08,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-14 23:58:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:08,282 INFO L225 Difference]: With dead ends: 246 [2020-10-14 23:58:08,282 INFO L226 Difference]: Without dead ends: 213 [2020-10-14 23:58:08,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-14 23:58:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 136. [2020-10-14 23:58:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 23:58:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 189 transitions. [2020-10-14 23:58:08,302 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 189 transitions. Word has length 22 [2020-10-14 23:58:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:08,302 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 189 transitions. [2020-10-14 23:58:08,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 189 transitions. [2020-10-14 23:58:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:58:08,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:08,303 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 23:58:08,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:58:08,304 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:08,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:08,304 INFO L82 PathProgramCache]: Analyzing trace with hash -570639538, now seen corresponding path program 3 times [2020-10-14 23:58:08,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:08,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202117160] [2020-10-14 23:58:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:08,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:08,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:08,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:08,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:08,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:09,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:58:09,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:09,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-10-14 23:58:09,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:09,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:09,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:58:09,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:09,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:58:09,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 23:58:09,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:09,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:09,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:09,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:09,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:09,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:09,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:09,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:09,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:09,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:09,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:09,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202117160] [2020-10-14 23:58:09,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:09,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:09,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058323608] [2020-10-14 23:58:09,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:09,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:09,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:09,176 INFO L87 Difference]: Start difference. First operand 136 states and 189 transitions. Second operand 10 states. [2020-10-14 23:58:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:09,373 INFO L93 Difference]: Finished difference Result 182 states and 247 transitions. [2020-10-14 23:58:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:58:09,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-14 23:58:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:09,375 INFO L225 Difference]: With dead ends: 182 [2020-10-14 23:58:09,376 INFO L226 Difference]: Without dead ends: 170 [2020-10-14 23:58:09,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-14 23:58:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-14 23:58:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 23:58:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 188 transitions. [2020-10-14 23:58:09,389 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 188 transitions. Word has length 23 [2020-10-14 23:58:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:09,390 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 188 transitions. [2020-10-14 23:58:09,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 188 transitions. [2020-10-14 23:58:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:58:09,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:09,391 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:09,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:58:09,391 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:09,391 INFO L82 PathProgramCache]: Analyzing trace with hash 66515710, now seen corresponding path program 2 times [2020-10-14 23:58:09,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:09,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139740423] [2020-10-14 23:58:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:09,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:09,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:58:09,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:09,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-14 23:58:09,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:09,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:09,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:58:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:58:09,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:10,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:10,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:10,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:10,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:10,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:10,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:10,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:10,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:10,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:10,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139740423] [2020-10-14 23:58:10,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:10,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:58:10,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387978760] [2020-10-14 23:58:10,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:58:10,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:58:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:10,099 INFO L87 Difference]: Start difference. First operand 136 states and 188 transitions. Second operand 12 states. [2020-10-14 23:58:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:10,338 INFO L93 Difference]: Finished difference Result 197 states and 264 transitions. [2020-10-14 23:58:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:10,339 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-14 23:58:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:10,340 INFO L225 Difference]: With dead ends: 197 [2020-10-14 23:58:10,341 INFO L226 Difference]: Without dead ends: 185 [2020-10-14 23:58:10,341 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 23:58:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-14 23:58:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 136. [2020-10-14 23:58:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 23:58:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 187 transitions. [2020-10-14 23:58:10,351 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 187 transitions. Word has length 23 [2020-10-14 23:58:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:10,352 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 187 transitions. [2020-10-14 23:58:10,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:58:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 187 transitions. [2020-10-14 23:58:10,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:58:10,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:10,353 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:10,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:58:10,353 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash 408297086, now seen corresponding path program 8 times [2020-10-14 23:58:10,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:10,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303533833] [2020-10-14 23:58:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:10,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:10,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:58:10,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:10,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-14 23:58:10,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:10,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:10,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:58:10,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:10,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:58:10,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:10,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:10,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:10,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:10,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:10,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:10,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:10,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:10,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:10,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303533833] [2020-10-14 23:58:10,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:10,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:58:10,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433221693] [2020-10-14 23:58:10,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:58:10,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:10,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:58:10,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:10,949 INFO L87 Difference]: Start difference. First operand 136 states and 187 transitions. Second operand 11 states. [2020-10-14 23:58:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:11,207 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2020-10-14 23:58:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:58:11,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-14 23:58:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:11,209 INFO L225 Difference]: With dead ends: 266 [2020-10-14 23:58:11,210 INFO L226 Difference]: Without dead ends: 233 [2020-10-14 23:58:11,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-14 23:58:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 146. [2020-10-14 23:58:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 23:58:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 202 transitions. [2020-10-14 23:58:11,222 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 202 transitions. Word has length 23 [2020-10-14 23:58:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:11,222 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 202 transitions. [2020-10-14 23:58:11,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:58:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 202 transitions. [2020-10-14 23:58:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:58:11,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:11,223 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:11,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:58:11,223 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:11,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:11,224 INFO L82 PathProgramCache]: Analyzing trace with hash 225867054, now seen corresponding path program 3 times [2020-10-14 23:58:11,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:11,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826673874] [2020-10-14 23:58:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:11,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:11,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:11,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:12,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:12,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:58:12,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:12,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-14 23:58:12,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:12,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:58:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:12,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:12,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:12,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:12,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:12,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:12,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:12,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:12,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:12,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:12,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:12,401 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 23:58:12,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826673874] [2020-10-14 23:58:12,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:12,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:58:12,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162421140] [2020-10-14 23:58:12,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:58:12,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:12,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:58:12,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:12,403 INFO L87 Difference]: Start difference. First operand 146 states and 202 transitions. Second operand 11 states. [2020-10-14 23:58:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:12,692 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2020-10-14 23:58:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:58:12,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-14 23:58:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:12,693 INFO L225 Difference]: With dead ends: 166 [2020-10-14 23:58:12,694 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 23:58:12,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:58:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 23:58:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2020-10-14 23:58:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 23:58:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 203 transitions. [2020-10-14 23:58:12,714 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 203 transitions. Word has length 24 [2020-10-14 23:58:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:12,714 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 203 transitions. [2020-10-14 23:58:12,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:58:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 203 transitions. [2020-10-14 23:58:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:58:12,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:12,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:12,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:58:12,716 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:12,716 INFO L82 PathProgramCache]: Analyzing trace with hash 843592862, now seen corresponding path program 5 times [2020-10-14 23:58:12,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:12,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000652998] [2020-10-14 23:58:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:12,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:12,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:12,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:13,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:13,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:13,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:58:13,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:13,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1115 [2020-10-14 23:58:13,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:13,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:58:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:14,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:14,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:14,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:14,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:14,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:14,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:14,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:14,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:14,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:14,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:14,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:14,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:58:14,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000652998] [2020-10-14 23:58:14,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:14,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:58:14,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174742634] [2020-10-14 23:58:14,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:58:14,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:14,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:58:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:14,145 INFO L87 Difference]: Start difference. First operand 147 states and 203 transitions. Second operand 11 states. [2020-10-14 23:58:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:14,440 INFO L93 Difference]: Finished difference Result 181 states and 247 transitions. [2020-10-14 23:58:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:58:14,441 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-14 23:58:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:14,442 INFO L225 Difference]: With dead ends: 181 [2020-10-14 23:58:14,442 INFO L226 Difference]: Without dead ends: 176 [2020-10-14 23:58:14,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-14 23:58:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 165. [2020-10-14 23:58:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 23:58:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 229 transitions. [2020-10-14 23:58:14,457 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 229 transitions. Word has length 24 [2020-10-14 23:58:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:14,458 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 229 transitions. [2020-10-14 23:58:14,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:58:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 229 transitions. [2020-10-14 23:58:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:58:14,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:14,459 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:14,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:58:14,460 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2080558835, now seen corresponding path program 9 times [2020-10-14 23:58:14,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:14,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668274042] [2020-10-14 23:58:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:14,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:14,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:14,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:15,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:15,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:58:15,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:15,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-14 23:58:15,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:15,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:15,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:58:15,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:15,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:58:15,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:15,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:15,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:15,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:15,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:15,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:15,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:15,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:15,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:15,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:15,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:15,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:15,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:15,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668274042] [2020-10-14 23:58:15,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:15,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:58:15,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446093994] [2020-10-14 23:58:15,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:58:15,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:15,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:58:15,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:15,401 INFO L87 Difference]: Start difference. First operand 165 states and 229 transitions. Second operand 12 states. [2020-10-14 23:58:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:15,714 INFO L93 Difference]: Finished difference Result 320 states and 468 transitions. [2020-10-14 23:58:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:58:15,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-14 23:58:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:15,718 INFO L225 Difference]: With dead ends: 320 [2020-10-14 23:58:15,718 INFO L226 Difference]: Without dead ends: 287 [2020-10-14 23:58:15,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-14 23:58:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 175. [2020-10-14 23:58:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-14 23:58:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 244 transitions. [2020-10-14 23:58:15,738 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 244 transitions. Word has length 24 [2020-10-14 23:58:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:15,738 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 244 transitions. [2020-10-14 23:58:15,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:58:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 244 transitions. [2020-10-14 23:58:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:58:15,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:15,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:15,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:58:15,741 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:15,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1552518129, now seen corresponding path program 4 times [2020-10-14 23:58:15,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:15,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209543210] [2020-10-14 23:58:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:15,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:15,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:15,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:18,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:58:18,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:18,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2265 [2020-10-14 23:58:18,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:18,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:58:18,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:58:18,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:58:18,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:18,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:18,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:18,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:18,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:18,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:18,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:18,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:18,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:18,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:18,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:18,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:58:18,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209543210] [2020-10-14 23:58:18,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:18,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:58:18,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759141459] [2020-10-14 23:58:18,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:58:18,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:18,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:58:18,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:18,082 INFO L87 Difference]: Start difference. First operand 175 states and 244 transitions. Second operand 6 states. [2020-10-14 23:58:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:18,179 INFO L93 Difference]: Finished difference Result 239 states and 341 transitions. [2020-10-14 23:58:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:58:18,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-14 23:58:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:18,183 INFO L225 Difference]: With dead ends: 239 [2020-10-14 23:58:18,184 INFO L226 Difference]: Without dead ends: 225 [2020-10-14 23:58:18,184 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 23:58:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-14 23:58:18,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 202. [2020-10-14 23:58:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-14 23:58:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 282 transitions. [2020-10-14 23:58:18,205 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 282 transitions. Word has length 25 [2020-10-14 23:58:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:18,205 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 282 transitions. [2020-10-14 23:58:18,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:58:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 282 transitions. [2020-10-14 23:58:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:58:18,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:18,207 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:18,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:58:18,207 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash 291494704, now seen corresponding path program 4 times [2020-10-14 23:58:18,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:18,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413211677] [2020-10-14 23:58:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:18,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:19,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:19,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:58:19,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:19,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-14 23:58:19,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:19,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:19,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:58:19,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:19,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:58:19,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:19,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:19,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:19,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:19,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:19,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:19,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:19,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:19,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:19,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:19,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:19,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:19,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:58:19,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413211677] [2020-10-14 23:58:19,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:19,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:19,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689428249] [2020-10-14 23:58:19,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:19,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:19,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:19,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:19,275 INFO L87 Difference]: Start difference. First operand 202 states and 282 transitions. Second operand 10 states. [2020-10-14 23:58:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:19,523 INFO L93 Difference]: Finished difference Result 247 states and 345 transitions. [2020-10-14 23:58:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:58:19,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-14 23:58:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:19,525 INFO L225 Difference]: With dead ends: 247 [2020-10-14 23:58:19,525 INFO L226 Difference]: Without dead ends: 230 [2020-10-14 23:58:19,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:58:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-14 23:58:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 195. [2020-10-14 23:58:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-14 23:58:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 274 transitions. [2020-10-14 23:58:19,544 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 274 transitions. Word has length 25 [2020-10-14 23:58:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:19,544 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 274 transitions. [2020-10-14 23:58:19,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 274 transitions. [2020-10-14 23:58:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:58:19,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:19,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:19,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:58:19,546 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:19,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1819941134, now seen corresponding path program 5 times [2020-10-14 23:58:19,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:19,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601840084] [2020-10-14 23:58:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:19,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:19,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:19,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:20,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:58:20,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-14 23:58:20,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:20,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:20,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:58:20,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:58:20,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:20,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:20,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:20,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:20,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:20,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:20,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:58:20,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601840084] [2020-10-14 23:58:20,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:20,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:20,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441897150] [2020-10-14 23:58:20,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:20,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:20,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:20,346 INFO L87 Difference]: Start difference. First operand 195 states and 274 transitions. Second operand 7 states. [2020-10-14 23:58:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:20,473 INFO L93 Difference]: Finished difference Result 272 states and 396 transitions. [2020-10-14 23:58:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:20,473 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 23:58:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:20,475 INFO L225 Difference]: With dead ends: 272 [2020-10-14 23:58:20,475 INFO L226 Difference]: Without dead ends: 255 [2020-10-14 23:58:20,475 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 23:58:20,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-14 23:58:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 226. [2020-10-14 23:58:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-14 23:58:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 315 transitions. [2020-10-14 23:58:20,492 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 315 transitions. Word has length 25 [2020-10-14 23:58:20,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:20,493 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 315 transitions. [2020-10-14 23:58:20,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 315 transitions. [2020-10-14 23:58:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:58:20,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:20,494 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:20,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:58:20,495 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:20,495 INFO L82 PathProgramCache]: Analyzing trace with hash 581647966, now seen corresponding path program 6 times [2020-10-14 23:58:20,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:20,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714984963] [2020-10-14 23:58:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:20,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:21,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:21,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:58:21,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:21,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-14 23:58:21,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:21,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:21,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:58:21,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:21,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:58:21,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:21,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:21,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:21,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:21,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:21,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:21,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:21,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:21,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:21,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:21,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714984963] [2020-10-14 23:58:21,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:21,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:58:21,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982807496] [2020-10-14 23:58:21,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:58:21,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:58:21,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:21,340 INFO L87 Difference]: Start difference. First operand 226 states and 315 transitions. Second operand 12 states. [2020-10-14 23:58:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:21,658 INFO L93 Difference]: Finished difference Result 305 states and 409 transitions. [2020-10-14 23:58:21,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:58:21,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-14 23:58:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:21,661 INFO L225 Difference]: With dead ends: 305 [2020-10-14 23:58:21,661 INFO L226 Difference]: Without dead ends: 292 [2020-10-14 23:58:21,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:58:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-14 23:58:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 226. [2020-10-14 23:58:21,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-14 23:58:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 314 transitions. [2020-10-14 23:58:21,688 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 314 transitions. Word has length 25 [2020-10-14 23:58:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:21,689 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 314 transitions. [2020-10-14 23:58:21,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:58:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 314 transitions. [2020-10-14 23:58:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:58:21,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:21,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:21,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:58:21,691 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:21,692 INFO L82 PathProgramCache]: Analyzing trace with hash -101728912, now seen corresponding path program 3 times [2020-10-14 23:58:21,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:21,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461712272] [2020-10-14 23:58:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:21,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:21,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:21,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:21,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:21,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:22,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:58:22,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:22,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-14 23:58:22,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:22,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:22,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:58:22,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:22,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:58:22,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:22,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:22,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:22,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:22,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:22,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:22,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:22,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:22,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:22,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461712272] [2020-10-14 23:58:22,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:22,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:58:22,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780318131] [2020-10-14 23:58:22,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:58:22,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:22,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:58:22,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:58:22,466 INFO L87 Difference]: Start difference. First operand 226 states and 314 transitions. Second operand 14 states. [2020-10-14 23:58:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:22,837 INFO L93 Difference]: Finished difference Result 324 states and 430 transitions. [2020-10-14 23:58:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:58:22,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-14 23:58:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:22,839 INFO L225 Difference]: With dead ends: 324 [2020-10-14 23:58:22,839 INFO L226 Difference]: Without dead ends: 311 [2020-10-14 23:58:22,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:58:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-14 23:58:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 226. [2020-10-14 23:58:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-14 23:58:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 313 transitions. [2020-10-14 23:58:22,854 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 313 transitions. Word has length 25 [2020-10-14 23:58:22,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:22,855 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 313 transitions. [2020-10-14 23:58:22,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:58:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 313 transitions. [2020-10-14 23:58:22,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:58:22,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:22,856 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:22,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:58:22,856 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:22,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1925681058, now seen corresponding path program 10 times [2020-10-14 23:58:22,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:22,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051671941] [2020-10-14 23:58:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:22,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:23,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:23,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:58:23,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:23,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-14 23:58:23,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:23,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:58:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:58:23,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:23,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:23,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:23,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:23,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:23,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:23,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:23,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:23,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:23,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:23,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:23,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051671941] [2020-10-14 23:58:23,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:23,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:58:23,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827439569] [2020-10-14 23:58:23,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:58:23,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:23,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:58:23,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:23,645 INFO L87 Difference]: Start difference. First operand 226 states and 313 transitions. Second operand 13 states. [2020-10-14 23:58:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:24,059 INFO L93 Difference]: Finished difference Result 424 states and 621 transitions. [2020-10-14 23:58:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:58:24,059 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-14 23:58:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:24,061 INFO L225 Difference]: With dead ends: 424 [2020-10-14 23:58:24,061 INFO L226 Difference]: Without dead ends: 385 [2020-10-14 23:58:24,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-14 23:58:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 240. [2020-10-14 23:58:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-14 23:58:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 334 transitions. [2020-10-14 23:58:24,079 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 334 transitions. Word has length 25 [2020-10-14 23:58:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:24,079 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 334 transitions. [2020-10-14 23:58:24,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:58:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 334 transitions. [2020-10-14 23:58:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:58:24,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:24,080 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:24,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:58:24,081 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1935000095, now seen corresponding path program 2 times [2020-10-14 23:58:24,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:24,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701697734] [2020-10-14 23:58:24,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:24,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:24,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:24,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:24,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:58:24,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:24,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-14 23:58:24,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:24,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:24,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:58:24,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:24,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:58:24,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:24,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:24,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:24,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:24,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:24,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:24,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:24,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:24,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:24,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:58:24,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701697734] [2020-10-14 23:58:24,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:24,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:24,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278197419] [2020-10-14 23:58:24,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:24,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:24,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:24,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:24,365 INFO L87 Difference]: Start difference. First operand 240 states and 334 transitions. Second operand 8 states. [2020-10-14 23:58:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:24,525 INFO L93 Difference]: Finished difference Result 254 states and 348 transitions. [2020-10-14 23:58:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:58:24,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 23:58:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:24,530 INFO L225 Difference]: With dead ends: 254 [2020-10-14 23:58:24,530 INFO L226 Difference]: Without dead ends: 214 [2020-10-14 23:58:24,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:58:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-14 23:58:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-14 23:58:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 23:58:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 302 transitions. [2020-10-14 23:58:24,546 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 302 transitions. Word has length 26 [2020-10-14 23:58:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:24,546 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 302 transitions. [2020-10-14 23:58:24,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 302 transitions. [2020-10-14 23:58:24,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:58:24,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:24,547 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:24,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:58:24,547 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:24,548 INFO L82 PathProgramCache]: Analyzing trace with hash -744554372, now seen corresponding path program 7 times [2020-10-14 23:58:24,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:24,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445265681] [2020-10-14 23:58:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:24,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:24,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:24,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:24,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:25,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:26,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:27,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:27,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:58:27,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:58:27,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3433 [2020-10-14 23:58:27,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:27,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:58:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:27,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:28,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:28,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:28,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:28,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:28,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:28,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:28,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:28,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:28,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:28,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:28,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:28,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:58:28,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445265681] [2020-10-14 23:58:28,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:28,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:28,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946635486] [2020-10-14 23:58:28,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:28,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:28,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:28,132 INFO L87 Difference]: Start difference. First operand 214 states and 302 transitions. Second operand 10 states. [2020-10-14 23:58:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:28,346 INFO L93 Difference]: Finished difference Result 238 states and 334 transitions. [2020-10-14 23:58:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:58:28,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 23:58:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:28,348 INFO L225 Difference]: With dead ends: 238 [2020-10-14 23:58:28,349 INFO L226 Difference]: Without dead ends: 233 [2020-10-14 23:58:28,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-14 23:58:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 223. [2020-10-14 23:58:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-14 23:58:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 315 transitions. [2020-10-14 23:58:28,372 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 315 transitions. Word has length 26 [2020-10-14 23:58:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:28,373 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 315 transitions. [2020-10-14 23:58:28,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 315 transitions. [2020-10-14 23:58:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:58:28,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:28,375 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:28,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:58:28,375 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1937149662, now seen corresponding path program 6 times [2020-10-14 23:58:28,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:28,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508786612] [2020-10-14 23:58:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:28,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:28,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:28,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:28,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:31,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:31,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:58:31,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:31,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2667 [2020-10-14 23:58:31,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:31,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:58:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:58:31,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:31,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:31,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:31,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:31,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:31,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:31,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:31,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:31,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:58:31,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508786612] [2020-10-14 23:58:31,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:31,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:31,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239453530] [2020-10-14 23:58:31,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:31,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:31,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:31,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:31,134 INFO L87 Difference]: Start difference. First operand 223 states and 315 transitions. Second operand 8 states. [2020-10-14 23:58:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:31,439 INFO L93 Difference]: Finished difference Result 296 states and 433 transitions. [2020-10-14 23:58:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:31,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 23:58:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:31,442 INFO L225 Difference]: With dead ends: 296 [2020-10-14 23:58:31,442 INFO L226 Difference]: Without dead ends: 281 [2020-10-14 23:58:31,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 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 23:58:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-14 23:58:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 247. [2020-10-14 23:58:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-14 23:58:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 348 transitions. [2020-10-14 23:58:31,459 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 348 transitions. Word has length 26 [2020-10-14 23:58:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:31,460 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 348 transitions. [2020-10-14 23:58:31,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 348 transitions. [2020-10-14 23:58:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:58:31,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:31,461 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:31,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:58:31,461 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1419437267, now seen corresponding path program 11 times [2020-10-14 23:58:31,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:31,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119783840] [2020-10-14 23:58:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:31,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:31,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:31,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:32,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:32,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:58:32,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:32,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-14 23:58:32,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:32,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:32,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:58:32,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:32,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:58:32,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:32,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:32,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:32,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:32,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:32,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:32,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:32,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:32,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:32,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:32,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:32,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:32,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:32,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119783840] [2020-10-14 23:58:32,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:32,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:58:32,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936372092] [2020-10-14 23:58:32,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:58:32,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:32,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:58:32,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:58:32,229 INFO L87 Difference]: Start difference. First operand 247 states and 348 transitions. Second operand 14 states. [2020-10-14 23:58:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:32,683 INFO L93 Difference]: Finished difference Result 438 states and 662 transitions. [2020-10-14 23:58:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:58:32,684 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-14 23:58:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:32,686 INFO L225 Difference]: With dead ends: 438 [2020-10-14 23:58:32,686 INFO L226 Difference]: Without dead ends: 394 [2020-10-14 23:58:32,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:58:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-14 23:58:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 263. [2020-10-14 23:58:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-14 23:58:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 372 transitions. [2020-10-14 23:58:32,728 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 372 transitions. Word has length 26 [2020-10-14 23:58:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:32,729 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 372 transitions. [2020-10-14 23:58:32,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:58:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 372 transitions. [2020-10-14 23:58:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:32,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:32,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:32,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:58:32,733 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash -305181938, now seen corresponding path program 8 times [2020-10-14 23:58:32,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:32,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896846266] [2020-10-14 23:58:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:32,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:32,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:32,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:58:32,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:32,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-14 23:58:32,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:32,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:32,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:32,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:58:32,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:58:32,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:33,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:33,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:33,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:33,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:33,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:33,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:33,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:33,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:33,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:33,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:33,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:33,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:58:33,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896846266] [2020-10-14 23:58:33,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:33,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:33,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112198034] [2020-10-14 23:58:33,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:33,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:33,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:33,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:33,059 INFO L87 Difference]: Start difference. First operand 263 states and 372 transitions. Second operand 7 states. [2020-10-14 23:58:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:33,451 INFO L93 Difference]: Finished difference Result 452 states and 573 transitions. [2020-10-14 23:58:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:58:33,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-14 23:58:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:33,455 INFO L225 Difference]: With dead ends: 452 [2020-10-14 23:58:33,455 INFO L226 Difference]: Without dead ends: 447 [2020-10-14 23:58:33,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-14 23:58:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 278. [2020-10-14 23:58:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-14 23:58:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 392 transitions. [2020-10-14 23:58:33,473 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 392 transitions. Word has length 27 [2020-10-14 23:58:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:33,474 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 392 transitions. [2020-10-14 23:58:33,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 392 transitions. [2020-10-14 23:58:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:33,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:33,475 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:33,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:58:33,476 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:33,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2027500286, now seen corresponding path program 9 times [2020-10-14 23:58:33,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:33,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376435421] [2020-10-14 23:58:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:33,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:33,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:33,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:33,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:33,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:34,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:58:34,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:34,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-14 23:58:34,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:34,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:34,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:58:34,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:34,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:58:34,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:34,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:34,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:34,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:34,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:34,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:34,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:34,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:34,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:34,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:34,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:58:34,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376435421] [2020-10-14 23:58:34,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:34,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:58:34,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497573460] [2020-10-14 23:58:34,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:58:34,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:58:34,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:58:34,362 INFO L87 Difference]: Start difference. First operand 278 states and 392 transitions. Second operand 12 states. [2020-10-14 23:58:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:34,698 INFO L93 Difference]: Finished difference Result 360 states and 490 transitions. [2020-10-14 23:58:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:58:34,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-14 23:58:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:34,700 INFO L225 Difference]: With dead ends: 360 [2020-10-14 23:58:34,700 INFO L226 Difference]: Without dead ends: 346 [2020-10-14 23:58:34,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:58:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-14 23:58:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 278. [2020-10-14 23:58:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-14 23:58:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 391 transitions. [2020-10-14 23:58:34,723 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 391 transitions. Word has length 27 [2020-10-14 23:58:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:34,723 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 391 transitions. [2020-10-14 23:58:34,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:58:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 391 transitions. [2020-10-14 23:58:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:34,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:34,724 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:34,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:58:34,724 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:34,725 INFO L82 PathProgramCache]: Analyzing trace with hash 301632782, now seen corresponding path program 10 times [2020-10-14 23:58:34,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:34,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443380066] [2020-10-14 23:58:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:58:35,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:35,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-14 23:58:35,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:58:35,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:35,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:58:35,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:35,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:35,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:35,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:35,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:35,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:35,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:35,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443380066] [2020-10-14 23:58:35,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:35,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:58:35,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635269509] [2020-10-14 23:58:35,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:58:35,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:58:35,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:58:35,479 INFO L87 Difference]: Start difference. First operand 278 states and 391 transitions. Second operand 14 states. [2020-10-14 23:58:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:35,856 INFO L93 Difference]: Finished difference Result 379 states and 511 transitions. [2020-10-14 23:58:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:58:35,856 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-10-14 23:58:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:35,858 INFO L225 Difference]: With dead ends: 379 [2020-10-14 23:58:35,859 INFO L226 Difference]: Without dead ends: 365 [2020-10-14 23:58:35,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:58:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-14 23:58:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 278. [2020-10-14 23:58:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-14 23:58:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 390 transitions. [2020-10-14 23:58:35,877 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 390 transitions. Word has length 27 [2020-10-14 23:58:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:35,877 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 390 transitions. [2020-10-14 23:58:35,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:58:35,877 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 390 transitions. [2020-10-14 23:58:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:35,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:35,878 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:35,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:58:35,878 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1631432958, now seen corresponding path program 4 times [2020-10-14 23:58:35,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:35,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019964764] [2020-10-14 23:58:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:36,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:58:36,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:36,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-14 23:58:36,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:36,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:58:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:58:36,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:36,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:36,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:36,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:36,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:36,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:36,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:36,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:36,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:36,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019964764] [2020-10-14 23:58:36,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:36,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:58:36,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102660076] [2020-10-14 23:58:36,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:58:36,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:36,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:58:36,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:36,974 INFO L87 Difference]: Start difference. First operand 278 states and 390 transitions. Second operand 16 states. [2020-10-14 23:58:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:37,401 INFO L93 Difference]: Finished difference Result 399 states and 533 transitions. [2020-10-14 23:58:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:58:37,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-14 23:58:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:37,404 INFO L225 Difference]: With dead ends: 399 [2020-10-14 23:58:37,404 INFO L226 Difference]: Without dead ends: 385 [2020-10-14 23:58:37,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:58:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-14 23:58:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 278. [2020-10-14 23:58:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-14 23:58:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 389 transitions. [2020-10-14 23:58:37,421 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 389 transitions. Word has length 27 [2020-10-14 23:58:37,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:37,422 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 389 transitions. [2020-10-14 23:58:37,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:58:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 389 transitions. [2020-10-14 23:58:37,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:37,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:37,423 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:37,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:58:37,423 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:37,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1389218366, now seen corresponding path program 12 times [2020-10-14 23:58:37,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:37,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187173570] [2020-10-14 23:58:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:37,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:37,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:58:37,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:37,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-14 23:58:37,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:37,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:58:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:58:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:37,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:37,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:37,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:37,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:37,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:37,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:37,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:37,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187173570] [2020-10-14 23:58:37,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:37,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:58:37,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995633246] [2020-10-14 23:58:37,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:58:37,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:37,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:58:37,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:58:37,975 INFO L87 Difference]: Start difference. First operand 278 states and 389 transitions. Second operand 15 states. [2020-10-14 23:58:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:38,512 INFO L93 Difference]: Finished difference Result 517 states and 771 transitions. [2020-10-14 23:58:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:58:38,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-14 23:58:38,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:38,516 INFO L225 Difference]: With dead ends: 517 [2020-10-14 23:58:38,516 INFO L226 Difference]: Without dead ends: 473 [2020-10-14 23:58:38,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:58:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-14 23:58:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 294. [2020-10-14 23:58:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-14 23:58:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 413 transitions. [2020-10-14 23:58:38,543 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 413 transitions. Word has length 27 [2020-10-14 23:58:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:38,543 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 413 transitions. [2020-10-14 23:58:38,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:58:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 413 transitions. [2020-10-14 23:58:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:58:38,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:38,545 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:38,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:58:38,545 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1736770227, now seen corresponding path program 13 times [2020-10-14 23:58:38,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:38,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604029022] [2020-10-14 23:58:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:39,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:58:39,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:39,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-10-14 23:58:39,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:39,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:39,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:58:39,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:39,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:58:39,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:39,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:39,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:39,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:39,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:39,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:39,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:39,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:39,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:39,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:39,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:39,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:39,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604029022] [2020-10-14 23:58:39,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:39,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:58:39,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086462681] [2020-10-14 23:58:39,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:58:39,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:39,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:58:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:39,786 INFO L87 Difference]: Start difference. First operand 294 states and 413 transitions. Second operand 16 states. [2020-10-14 23:58:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:40,383 INFO L93 Difference]: Finished difference Result 546 states and 818 transitions. [2020-10-14 23:58:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:58:40,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-10-14 23:58:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:40,386 INFO L225 Difference]: With dead ends: 546 [2020-10-14 23:58:40,386 INFO L226 Difference]: Without dead ends: 502 [2020-10-14 23:58:40,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-14 23:58:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 310. [2020-10-14 23:58:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-14 23:58:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2020-10-14 23:58:40,408 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 28 [2020-10-14 23:58:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:40,408 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2020-10-14 23:58:40,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:58:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2020-10-14 23:58:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:40,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:40,409 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:40,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:58:40,410 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash -84857042, now seen corresponding path program 3 times [2020-10-14 23:58:40,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:40,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193427875] [2020-10-14 23:58:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:40,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:40,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:40,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-14 23:58:40,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:40,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:40,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:40,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 23:58:40,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:40,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:40,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:40,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:40,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:40,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:40,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:40,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:40,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:40,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:40,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:40,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 23:58:40,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193427875] [2020-10-14 23:58:40,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:40,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:40,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760566436] [2020-10-14 23:58:40,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:40,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:40,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:40,690 INFO L87 Difference]: Start difference. First operand 310 states and 437 transitions. Second operand 7 states. [2020-10-14 23:58:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:40,780 INFO L93 Difference]: Finished difference Result 593 states and 732 transitions. [2020-10-14 23:58:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:40,780 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-14 23:58:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:40,784 INFO L225 Difference]: With dead ends: 593 [2020-10-14 23:58:40,784 INFO L226 Difference]: Without dead ends: 570 [2020-10-14 23:58:40,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-10-14 23:58:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 337. [2020-10-14 23:58:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-14 23:58:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 470 transitions. [2020-10-14 23:58:40,805 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 470 transitions. Word has length 29 [2020-10-14 23:58:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:40,805 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 470 transitions. [2020-10-14 23:58:40,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 470 transitions. [2020-10-14 23:58:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:40,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:40,806 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:40,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:58:40,807 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash -920955728, now seen corresponding path program 11 times [2020-10-14 23:58:40,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:40,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272698739] [2020-10-14 23:58:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:41,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:41,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:41,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-14 23:58:41,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:41,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:58:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:41,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:41,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:41,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:41,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:41,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:41,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:41,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:41,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:41,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:41,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:58:41,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272698739] [2020-10-14 23:58:41,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:41,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:58:41,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681962187] [2020-10-14 23:58:41,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:58:41,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:41,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:58:41,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:58:41,885 INFO L87 Difference]: Start difference. First operand 337 states and 470 transitions. Second operand 14 states. [2020-10-14 23:58:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:42,316 INFO L93 Difference]: Finished difference Result 457 states and 614 transitions. [2020-10-14 23:58:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:58:42,317 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-14 23:58:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:42,319 INFO L225 Difference]: With dead ends: 457 [2020-10-14 23:58:42,319 INFO L226 Difference]: Without dead ends: 442 [2020-10-14 23:58:42,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:58:42,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-14 23:58:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 337. [2020-10-14 23:58:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-14 23:58:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 469 transitions. [2020-10-14 23:58:42,338 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 469 transitions. Word has length 29 [2020-10-14 23:58:42,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:42,339 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 469 transitions. [2020-10-14 23:58:42,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:58:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 469 transitions. [2020-10-14 23:58:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:42,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:42,340 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:42,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:58:42,340 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:42,340 INFO L82 PathProgramCache]: Analyzing trace with hash -718957538, now seen corresponding path program 12 times [2020-10-14 23:58:42,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:42,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825075130] [2020-10-14 23:58:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:42,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:43,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:43,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:43,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-14 23:58:43,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:43,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:43,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:58:43,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:43,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:43,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:43,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:43,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:43,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:43,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:43,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:43,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:43,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:43,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:43,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825075130] [2020-10-14 23:58:43,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:43,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:58:43,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22756377] [2020-10-14 23:58:43,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:58:43,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:43,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:58:43,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:43,667 INFO L87 Difference]: Start difference. First operand 337 states and 469 transitions. Second operand 16 states. [2020-10-14 23:58:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:44,147 INFO L93 Difference]: Finished difference Result 481 states and 641 transitions. [2020-10-14 23:58:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:58:44,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-14 23:58:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:44,149 INFO L225 Difference]: With dead ends: 481 [2020-10-14 23:58:44,150 INFO L226 Difference]: Without dead ends: 466 [2020-10-14 23:58:44,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:58:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-14 23:58:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 337. [2020-10-14 23:58:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-14 23:58:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 468 transitions. [2020-10-14 23:58:44,171 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 468 transitions. Word has length 29 [2020-10-14 23:58:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:44,171 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 468 transitions. [2020-10-14 23:58:44,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:58:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 468 transitions. [2020-10-14 23:58:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:44,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:44,172 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:44,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:58:44,172 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1405178128, now seen corresponding path program 5 times [2020-10-14 23:58:44,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:44,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104979675] [2020-10-14 23:58:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:44,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:45,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:45,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:45,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1114 [2020-10-14 23:58:45,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:45,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:45,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:58:45,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:45,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:45,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:45,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:45,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:45,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:45,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:45,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:45,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:45,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:45,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:45,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104979675] [2020-10-14 23:58:45,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:45,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:58:45,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317300322] [2020-10-14 23:58:45,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:58:45,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:45,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:58:45,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:58:45,554 INFO L87 Difference]: Start difference. First operand 337 states and 468 transitions. Second operand 18 states. [2020-10-14 23:58:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:46,102 INFO L93 Difference]: Finished difference Result 506 states and 669 transitions. [2020-10-14 23:58:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:58:46,102 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-14 23:58:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:46,104 INFO L225 Difference]: With dead ends: 506 [2020-10-14 23:58:46,104 INFO L226 Difference]: Without dead ends: 491 [2020-10-14 23:58:46,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:58:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-14 23:58:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 337. [2020-10-14 23:58:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-14 23:58:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 467 transitions. [2020-10-14 23:58:46,124 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 467 transitions. Word has length 29 [2020-10-14 23:58:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:46,124 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 467 transitions. [2020-10-14 23:58:46,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:58:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 467 transitions. [2020-10-14 23:58:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:46,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:46,126 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:46,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:58:46,126 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash 141831198, now seen corresponding path program 14 times [2020-10-14 23:58:46,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:46,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431341395] [2020-10-14 23:58:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:46,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:46,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:46,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:47,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:47,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:47,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:47,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-14 23:58:47,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:47,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:47,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:58:47,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:47,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:58:47,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:47,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:47,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:47,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:47,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:47,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:47,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:58:47,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:47,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:47,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:47,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431341395] [2020-10-14 23:58:47,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:47,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:58:47,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484457091] [2020-10-14 23:58:47,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:58:47,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:47,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:58:47,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:58:47,404 INFO L87 Difference]: Start difference. First operand 337 states and 467 transitions. Second operand 17 states. [2020-10-14 23:58:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:48,087 INFO L93 Difference]: Finished difference Result 681 states and 990 transitions. [2020-10-14 23:58:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:58:48,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-14 23:58:48,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:48,090 INFO L225 Difference]: With dead ends: 681 [2020-10-14 23:58:48,090 INFO L226 Difference]: Without dead ends: 621 [2020-10-14 23:58:48,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:58:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-14 23:58:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 353. [2020-10-14 23:58:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-14 23:58:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 491 transitions. [2020-10-14 23:58:48,110 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 491 transitions. Word has length 29 [2020-10-14 23:58:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:48,110 INFO L479 AbstractCegarLoop]: Abstraction has 353 states and 491 transitions. [2020-10-14 23:58:48,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:58:48,111 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 491 transitions. [2020-10-14 23:58:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:48,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:48,112 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 23:58:48,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:58:48,112 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1106991537, now seen corresponding path program 4 times [2020-10-14 23:58:48,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:48,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588583024] [2020-10-14 23:58:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:48,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:53,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:53,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:53,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:58:53,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:53,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:58:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:58:53,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:53,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:53,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:53,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:53,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:53,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:53,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:53,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-14 23:58:53,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588583024] [2020-10-14 23:58:53,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:53,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:58:53,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296146533] [2020-10-14 23:58:53,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:58:53,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:53,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:58:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:53,358 INFO L87 Difference]: Start difference. First operand 353 states and 491 transitions. Second operand 13 states. [2020-10-14 23:58:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:53,697 INFO L93 Difference]: Finished difference Result 364 states and 502 transitions. [2020-10-14 23:58:53,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:58:53,697 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-14 23:58:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:53,699 INFO L225 Difference]: With dead ends: 364 [2020-10-14 23:58:53,700 INFO L226 Difference]: Without dead ends: 337 [2020-10-14 23:58:53,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-14 23:58:53,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2020-10-14 23:58:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-14 23:58:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 472 transitions. [2020-10-14 23:58:53,723 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 472 transitions. Word has length 30 [2020-10-14 23:58:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:53,723 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 472 transitions. [2020-10-14 23:58:53,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:58:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 472 transitions. [2020-10-14 23:58:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:53,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:53,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:53,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:58:53,724 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:53,725 INFO L82 PathProgramCache]: Analyzing trace with hash 703949023, now seen corresponding path program 5 times [2020-10-14 23:58:53,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:53,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578538339] [2020-10-14 23:58:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:53,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:54,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:55,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:55,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:55,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:55,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-14 23:58:55,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:55,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:55,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:55,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 23:58:55,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:55,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:55,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:55,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:55,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:55,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:55,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:55,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:55,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:55,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:55,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:55,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:55,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:55,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-14 23:58:55,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578538339] [2020-10-14 23:58:55,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:55,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:55,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062799679] [2020-10-14 23:58:55,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:55,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:55,193 INFO L87 Difference]: Start difference. First operand 337 states and 472 transitions. Second operand 8 states. [2020-10-14 23:58:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:55,300 INFO L93 Difference]: Finished difference Result 662 states and 810 transitions. [2020-10-14 23:58:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:55,301 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-14 23:58:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:55,304 INFO L225 Difference]: With dead ends: 662 [2020-10-14 23:58:55,304 INFO L226 Difference]: Without dead ends: 656 [2020-10-14 23:58:55,304 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 23:58:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-10-14 23:58:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 376. [2020-10-14 23:58:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-14 23:58:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 519 transitions. [2020-10-14 23:58:55,324 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 519 transitions. Word has length 30 [2020-10-14 23:58:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:55,325 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 519 transitions. [2020-10-14 23:58:55,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 519 transitions. [2020-10-14 23:58:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:55,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:55,326 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:55,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:58:55,327 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:55,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1751066771, now seen corresponding path program 15 times [2020-10-14 23:58:55,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:55,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218333069] [2020-10-14 23:58:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:55,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:55,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:55,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:56,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:56,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:56,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:56,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-14 23:58:56,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:56,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:56,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:58:56,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:56,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:58:56,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:56,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:56,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:56,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:56,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:56,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:56,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:56,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:56,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:56,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:56,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218333069] [2020-10-14 23:58:56,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:56,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:58:56,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668859368] [2020-10-14 23:58:56,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:58:56,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:56,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:58:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:58:56,412 INFO L87 Difference]: Start difference. First operand 376 states and 519 transitions. Second operand 18 states. [2020-10-14 23:58:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:57,172 INFO L93 Difference]: Finished difference Result 770 states and 1104 transitions. [2020-10-14 23:58:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:58:57,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-10-14 23:58:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:57,175 INFO L225 Difference]: With dead ends: 770 [2020-10-14 23:58:57,175 INFO L226 Difference]: Without dead ends: 702 [2020-10-14 23:58:57,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:58:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-10-14 23:58:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 392. [2020-10-14 23:58:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-14 23:58:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 543 transitions. [2020-10-14 23:58:57,196 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 543 transitions. Word has length 30 [2020-10-14 23:58:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:57,196 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 543 transitions. [2020-10-14 23:58:57,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:58:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 543 transitions. [2020-10-14 23:58:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:57,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:57,197 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:57,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:58:57,199 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1737292030, now seen corresponding path program 13 times [2020-10-14 23:58:57,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:57,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500816369] [2020-10-14 23:58:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:57,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:58,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:58,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:58,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:58,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1633 [2020-10-14 23:58:58,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:58,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:58,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:58:58,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:58,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:58,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:59,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:59,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:59,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:59,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:59,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:59,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:59,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:59,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:59,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:58:59,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500816369] [2020-10-14 23:58:59,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:59,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:58:59,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491933915] [2020-10-14 23:58:59,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:58:59,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:59,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:58:59,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:59,138 INFO L87 Difference]: Start difference. First operand 392 states and 543 transitions. Second operand 16 states. [2020-10-14 23:58:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:59,876 INFO L93 Difference]: Finished difference Result 543 states and 722 transitions. [2020-10-14 23:58:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:58:59,877 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-14 23:58:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:59,881 INFO L225 Difference]: With dead ends: 543 [2020-10-14 23:58:59,881 INFO L226 Difference]: Without dead ends: 527 [2020-10-14 23:58:59,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-10-14 23:58:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 392. [2020-10-14 23:58:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-14 23:58:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 542 transitions. [2020-10-14 23:58:59,913 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 542 transitions. Word has length 31 [2020-10-14 23:58:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:59,914 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 542 transitions. [2020-10-14 23:58:59,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:58:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 542 transitions. [2020-10-14 23:58:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:59,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:59,920 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:59,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:58:59,921 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1573584590, now seen corresponding path program 14 times [2020-10-14 23:58:59,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:59,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443217331] [2020-10-14 23:58:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:59,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:01,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:01,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:59:01,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:01,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-10-14 23:59:01,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:01,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:01,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:59:01,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:01,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:59:01,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:01,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:01,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:01,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:01,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:01,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:01,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:01,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:01,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:01,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443217331] [2020-10-14 23:59:01,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:01,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:59:01,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251186598] [2020-10-14 23:59:01,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:59:01,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:59:01,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:59:01,624 INFO L87 Difference]: Start difference. First operand 392 states and 542 transitions. Second operand 18 states. [2020-10-14 23:59:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:02,211 INFO L93 Difference]: Finished difference Result 569 states and 751 transitions. [2020-10-14 23:59:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:59:02,211 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-14 23:59:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:02,213 INFO L225 Difference]: With dead ends: 569 [2020-10-14 23:59:02,213 INFO L226 Difference]: Without dead ends: 553 [2020-10-14 23:59:02,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:59:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-10-14 23:59:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 392. [2020-10-14 23:59:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-14 23:59:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 541 transitions. [2020-10-14 23:59:02,232 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 541 transitions. Word has length 31 [2020-10-14 23:59:02,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:02,232 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 541 transitions. [2020-10-14 23:59:02,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:59:02,232 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 541 transitions. [2020-10-14 23:59:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:59:02,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:02,233 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:02,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:59:02,234 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:02,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:02,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1479737602, now seen corresponding path program 6 times [2020-10-14 23:59:02,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:02,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423719472] [2020-10-14 23:59:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:02,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:03,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:59:03,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:03,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-14 23:59:03,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:03,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:03,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:59:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:59:03,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:03,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:03,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:03,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:03,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:03,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:03,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:03,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:03,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:03,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:03,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:03,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:03,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423719472] [2020-10-14 23:59:03,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:03,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:59:03,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287187025] [2020-10-14 23:59:03,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:59:03,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:03,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:59:03,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:59:03,640 INFO L87 Difference]: Start difference. First operand 392 states and 541 transitions. Second operand 20 states. [2020-10-14 23:59:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:04,283 INFO L93 Difference]: Finished difference Result 596 states and 781 transitions. [2020-10-14 23:59:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:59:04,285 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-14 23:59:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:04,286 INFO L225 Difference]: With dead ends: 596 [2020-10-14 23:59:04,287 INFO L226 Difference]: Without dead ends: 580 [2020-10-14 23:59:04,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:59:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-10-14 23:59:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 392. [2020-10-14 23:59:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-14 23:59:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 540 transitions. [2020-10-14 23:59:04,304 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 540 transitions. Word has length 31 [2020-10-14 23:59:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:04,305 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 540 transitions. [2020-10-14 23:59:04,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:59:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 540 transitions. [2020-10-14 23:59:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:59:04,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:04,309 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:04,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:59:04,310 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:04,310 INFO L82 PathProgramCache]: Analyzing trace with hash -301361666, now seen corresponding path program 16 times [2020-10-14 23:59:04,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:04,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738823371] [2020-10-14 23:59:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:04,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:59:04,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:04,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-14 23:59:04,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:04,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:04,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:59:04,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:04,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:59:04,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:05,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:05,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:05,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:05,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:05,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:05,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:05,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:05,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:05,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:05,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:05,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:05,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738823371] [2020-10-14 23:59:05,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:05,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:59:05,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531153869] [2020-10-14 23:59:05,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:59:05,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:05,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:59:05,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:59:05,267 INFO L87 Difference]: Start difference. First operand 392 states and 540 transitions. Second operand 19 states. [2020-10-14 23:59:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:06,121 INFO L93 Difference]: Finished difference Result 804 states and 1154 transitions. [2020-10-14 23:59:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:59:06,121 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-10-14 23:59:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:06,124 INFO L225 Difference]: With dead ends: 804 [2020-10-14 23:59:06,125 INFO L226 Difference]: Without dead ends: 736 [2020-10-14 23:59:06,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:59:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-10-14 23:59:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 408. [2020-10-14 23:59:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-10-14 23:59:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 564 transitions. [2020-10-14 23:59:06,144 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 564 transitions. Word has length 31 [2020-10-14 23:59:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:06,145 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 564 transitions. [2020-10-14 23:59:06,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:59:06,145 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 564 transitions. [2020-10-14 23:59:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:06,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:06,146 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 23:59:06,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:59:06,146 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:06,147 INFO L82 PathProgramCache]: Analyzing trace with hash 761043055, now seen corresponding path program 6 times [2020-10-14 23:59:06,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:06,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815776899] [2020-10-14 23:59:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:06,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:08,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:08,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:08,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:08,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2419 [2020-10-14 23:59:08,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:08,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:08,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:59:08,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:08,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:08,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:08,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:08,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:08,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:08,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:08,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:08,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:08,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:08,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:08,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:08,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:08,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:08,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:59:08,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815776899] [2020-10-14 23:59:08,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:08,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:59:08,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447442441] [2020-10-14 23:59:08,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:59:08,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:59:08,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:59:08,774 INFO L87 Difference]: Start difference. First operand 408 states and 564 transitions. Second operand 15 states. [2020-10-14 23:59:09,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:09,229 INFO L93 Difference]: Finished difference Result 495 states and 669 transitions. [2020-10-14 23:59:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:59:09,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-14 23:59:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:09,232 INFO L225 Difference]: With dead ends: 495 [2020-10-14 23:59:09,232 INFO L226 Difference]: Without dead ends: 478 [2020-10-14 23:59:09,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:59:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-14 23:59:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 402. [2020-10-14 23:59:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-14 23:59:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 557 transitions. [2020-10-14 23:59:09,251 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 557 transitions. Word has length 32 [2020-10-14 23:59:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:09,251 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 557 transitions. [2020-10-14 23:59:09,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:59:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 557 transitions. [2020-10-14 23:59:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:09,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:09,252 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:09,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:59:09,253 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:09,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1334883153, now seen corresponding path program 7 times [2020-10-14 23:59:09,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:09,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782125978] [2020-10-14 23:59:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:09,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:09,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:09,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:10,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:12,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:12,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:12,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2937 [2020-10-14 23:59:12,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:12,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:59:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:59:12,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:12,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:12,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:12,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:12,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:12,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:12,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:12,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:12,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:12,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:12,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:12,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 23:59:12,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782125978] [2020-10-14 23:59:12,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:12,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:59:12,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728431808] [2020-10-14 23:59:12,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:59:12,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:12,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:59:12,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:12,358 INFO L87 Difference]: Start difference. First operand 402 states and 557 transitions. Second operand 11 states. [2020-10-14 23:59:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:12,644 INFO L93 Difference]: Finished difference Result 442 states and 606 transitions. [2020-10-14 23:59:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:59:12,644 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-14 23:59:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:12,647 INFO L225 Difference]: With dead ends: 442 [2020-10-14 23:59:12,647 INFO L226 Difference]: Without dead ends: 417 [2020-10-14 23:59:12,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-14 23:59:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 412. [2020-10-14 23:59:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-14 23:59:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 574 transitions. [2020-10-14 23:59:12,661 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 574 transitions. Word has length 32 [2020-10-14 23:59:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:12,661 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 574 transitions. [2020-10-14 23:59:12,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:59:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 574 transitions. [2020-10-14 23:59:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:12,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:12,662 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:12,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:59:12,663 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:12,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:12,663 INFO L82 PathProgramCache]: Analyzing trace with hash -839091507, now seen corresponding path program 5 times [2020-10-14 23:59:12,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:12,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218833446] [2020-10-14 23:59:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:12,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:16,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:16,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:16,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:16,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3956 [2020-10-14 23:59:16,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:16,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:16,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:59:16,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:59:16,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:59:16,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:16,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:16,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:16,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:16,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:16,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:16,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:16,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:16,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:16,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-14 23:59:16,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218833446] [2020-10-14 23:59:16,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:16,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:59:16,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306731814] [2020-10-14 23:59:16,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:59:16,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:16,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:59:16,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:16,725 INFO L87 Difference]: Start difference. First operand 412 states and 574 transitions. Second operand 9 states. [2020-10-14 23:59:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:16,924 INFO L93 Difference]: Finished difference Result 550 states and 792 transitions. [2020-10-14 23:59:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:16,925 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-14 23:59:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:16,927 INFO L225 Difference]: With dead ends: 550 [2020-10-14 23:59:16,927 INFO L226 Difference]: Without dead ends: 524 [2020-10-14 23:59:16,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-14 23:59:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 459. [2020-10-14 23:59:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-14 23:59:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 637 transitions. [2020-10-14 23:59:16,947 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 637 transitions. Word has length 32 [2020-10-14 23:59:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:16,947 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 637 transitions. [2020-10-14 23:59:16,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:59:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 637 transitions. [2020-10-14 23:59:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:16,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:16,949 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:16,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:59:16,949 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:16,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1689823629, now seen corresponding path program 17 times [2020-10-14 23:59:16,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:16,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80242075] [2020-10-14 23:59:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:16,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:17,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:17,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:17,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-14 23:59:17,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:17,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:17,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:59:17,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:59:17,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:18,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:18,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:18,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:18,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:18,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:18,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:18,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:18,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:18,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:18,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:18,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:18,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80242075] [2020-10-14 23:59:18,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:18,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:59:18,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300980782] [2020-10-14 23:59:18,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:59:18,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:59:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:59:18,372 INFO L87 Difference]: Start difference. First operand 459 states and 637 transitions. Second operand 20 states. [2020-10-14 23:59:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:19,542 INFO L93 Difference]: Finished difference Result 919 states and 1333 transitions. [2020-10-14 23:59:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:59:19,542 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-10-14 23:59:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:19,545 INFO L225 Difference]: With dead ends: 919 [2020-10-14 23:59:19,545 INFO L226 Difference]: Without dead ends: 843 [2020-10-14 23:59:19,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:59:19,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-10-14 23:59:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 477. [2020-10-14 23:59:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-14 23:59:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 664 transitions. [2020-10-14 23:59:19,565 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 664 transitions. Word has length 32 [2020-10-14 23:59:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:19,566 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 664 transitions. [2020-10-14 23:59:19,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:59:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 664 transitions. [2020-10-14 23:59:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:19,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:19,567 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:19,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:59:19,567 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:19,568 INFO L82 PathProgramCache]: Analyzing trace with hash 331512257, now seen corresponding path program 8 times [2020-10-14 23:59:19,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:19,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447898584] [2020-10-14 23:59:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:19,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:19,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:19,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:19,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:24,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:24,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:24,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:59:24,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:59:24,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:24,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:24,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:59:24,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:59:24,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:59:24,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:24,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:24,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:24,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:24,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:24,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:24,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:24,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:24,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:24,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:24,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:24,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:24,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 23:59:24,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447898584] [2020-10-14 23:59:24,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:24,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:59:24,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795508573] [2020-10-14 23:59:24,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:59:24,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:24,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:59:24,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:24,705 INFO L87 Difference]: Start difference. First operand 477 states and 664 transitions. Second operand 10 states. [2020-10-14 23:59:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:31,307 INFO L93 Difference]: Finished difference Result 615 states and 858 transitions. [2020-10-14 23:59:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:59:31,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-14 23:59:31,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:31,316 INFO L225 Difference]: With dead ends: 615 [2020-10-14 23:59:31,316 INFO L226 Difference]: Without dead ends: 603 [2020-10-14 23:59:31,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:59:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-14 23:59:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 491. [2020-10-14 23:59:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-14 23:59:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 678 transitions. [2020-10-14 23:59:31,343 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 678 transitions. Word has length 33 [2020-10-14 23:59:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:31,343 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 678 transitions. [2020-10-14 23:59:31,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:59:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 678 transitions. [2020-10-14 23:59:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:31,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:31,344 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:31,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 23:59:31,345 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash 827303903, now seen corresponding path program 6 times [2020-10-14 23:59:31,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:31,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633376775] [2020-10-14 23:59:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:31,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:31,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:31,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:31,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:31,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:36,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:36,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 23:59:36,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:36,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:59:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:59:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:59:36,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:36,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:36,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:36,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:36,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:36,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:36,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:36,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:36,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-14 23:59:36,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633376775] [2020-10-14 23:59:36,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:36,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:59:36,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422030165] [2020-10-14 23:59:36,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:59:36,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:36,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:59:36,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:36,478 INFO L87 Difference]: Start difference. First operand 491 states and 678 transitions. Second operand 10 states. [2020-10-14 23:59:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:36,760 INFO L93 Difference]: Finished difference Result 623 states and 882 transitions. [2020-10-14 23:59:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:59:36,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-14 23:59:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:36,762 INFO L225 Difference]: With dead ends: 623 [2020-10-14 23:59:36,762 INFO L226 Difference]: Without dead ends: 604 [2020-10-14 23:59:36,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-10-14 23:59:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 535. [2020-10-14 23:59:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-14 23:59:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 744 transitions. [2020-10-14 23:59:36,783 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 744 transitions. Word has length 33 [2020-10-14 23:59:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:36,783 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 744 transitions. [2020-10-14 23:59:36,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:59:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 744 transitions. [2020-10-14 23:59:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:36,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:36,784 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:36,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 23:59:36,784 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1573120994, now seen corresponding path program 15 times [2020-10-14 23:59:36,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:36,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979135169] [2020-10-14 23:59:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:36,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:39,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:39,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:39,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2213 [2020-10-14 23:59:39,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:39,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:39,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:59:39,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:39,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:39,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:39,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:39,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:39,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:39,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:39,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:39,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:39,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:39,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:59:39,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979135169] [2020-10-14 23:59:39,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:39,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:59:39,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66275964] [2020-10-14 23:59:39,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:59:39,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:39,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:59:39,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:59:39,226 INFO L87 Difference]: Start difference. First operand 535 states and 744 transitions. Second operand 16 states. [2020-10-14 23:59:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:39,843 INFO L93 Difference]: Finished difference Result 715 states and 956 transitions. [2020-10-14 23:59:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:59:39,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-14 23:59:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:39,846 INFO L225 Difference]: With dead ends: 715 [2020-10-14 23:59:39,846 INFO L226 Difference]: Without dead ends: 698 [2020-10-14 23:59:39,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-14 23:59:39,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 535. [2020-10-14 23:59:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-14 23:59:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 743 transitions. [2020-10-14 23:59:39,870 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 743 transitions. Word has length 33 [2020-10-14 23:59:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:39,870 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 743 transitions. [2020-10-14 23:59:39,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:59:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 743 transitions. [2020-10-14 23:59:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:39,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:39,871 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:39,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 23:59:39,872 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:39,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1608876496, now seen corresponding path program 16 times [2020-10-14 23:59:39,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:39,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198091897] [2020-10-14 23:59:39,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:39,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:41,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:41,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:41,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2023 [2020-10-14 23:59:41,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:41,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:41,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:59:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:41,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:42,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:42,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:42,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:42,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:42,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:42,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:42,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:42,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:42,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:42,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:42,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:59:42,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198091897] [2020-10-14 23:59:42,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:42,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:59:42,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558725138] [2020-10-14 23:59:42,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:59:42,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:59:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:59:42,172 INFO L87 Difference]: Start difference. First operand 535 states and 743 transitions. Second operand 18 states. [2020-10-14 23:59:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:42,824 INFO L93 Difference]: Finished difference Result 743 states and 987 transitions. [2020-10-14 23:59:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:59:42,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-14 23:59:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:42,827 INFO L225 Difference]: With dead ends: 743 [2020-10-14 23:59:42,827 INFO L226 Difference]: Without dead ends: 726 [2020-10-14 23:59:42,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-10-14 23:59:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 535. [2020-10-14 23:59:42,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-14 23:59:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 742 transitions. [2020-10-14 23:59:42,846 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 742 transitions. Word has length 33 [2020-10-14 23:59:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:42,847 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 742 transitions. [2020-10-14 23:59:42,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:59:42,847 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 742 transitions. [2020-10-14 23:59:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:42,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:42,848 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:42,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 23:59:42,848 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash -224556578, now seen corresponding path program 17 times [2020-10-14 23:59:42,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:42,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500344050] [2020-10-14 23:59:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:42,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:44,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:44,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1674 [2020-10-14 23:59:44,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:59:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:44,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:44,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:44,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:44,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:44,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:44,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:44,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:44,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:44,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500344050] [2020-10-14 23:59:44,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:44,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:59:44,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678164661] [2020-10-14 23:59:44,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:59:44,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:44,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:59:44,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:59:44,851 INFO L87 Difference]: Start difference. First operand 535 states and 742 transitions. Second operand 20 states. [2020-10-14 23:59:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:45,585 INFO L93 Difference]: Finished difference Result 772 states and 1019 transitions. [2020-10-14 23:59:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:59:45,588 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-10-14 23:59:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:45,592 INFO L225 Difference]: With dead ends: 772 [2020-10-14 23:59:45,592 INFO L226 Difference]: Without dead ends: 755 [2020-10-14 23:59:45,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:59:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2020-10-14 23:59:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 535. [2020-10-14 23:59:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-14 23:59:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 741 transitions. [2020-10-14 23:59:45,614 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 741 transitions. Word has length 33 [2020-10-14 23:59:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:45,615 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 741 transitions. [2020-10-14 23:59:45,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:59:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 741 transitions. [2020-10-14 23:59:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:45,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:45,616 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:45,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 23:59:45,616 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:45,616 INFO L82 PathProgramCache]: Analyzing trace with hash 651382896, now seen corresponding path program 7 times [2020-10-14 23:59:45,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:45,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474587482] [2020-10-14 23:59:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:45,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:46,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:46,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:46,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1227 [2020-10-14 23:59:46,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:46,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:46,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:59:46,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:46,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:46,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:47,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:47,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:47,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:47,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:47,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:47,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:47,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:47,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:47,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:47,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:47,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:47,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:47,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474587482] [2020-10-14 23:59:47,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:47,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:59:47,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490440710] [2020-10-14 23:59:47,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:59:47,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:59:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:59:47,324 INFO L87 Difference]: Start difference. First operand 535 states and 741 transitions. Second operand 22 states. [2020-10-14 23:59:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:48,247 INFO L93 Difference]: Finished difference Result 802 states and 1052 transitions. [2020-10-14 23:59:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:59:48,247 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-14 23:59:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:48,251 INFO L225 Difference]: With dead ends: 802 [2020-10-14 23:59:48,251 INFO L226 Difference]: Without dead ends: 785 [2020-10-14 23:59:48,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:59:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-10-14 23:59:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 535. [2020-10-14 23:59:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-14 23:59:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 740 transitions. [2020-10-14 23:59:48,280 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 740 transitions. Word has length 33 [2020-10-14 23:59:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:48,280 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 740 transitions. [2020-10-14 23:59:48,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:59:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 740 transitions. [2020-10-14 23:59:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:48,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:48,282 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:48,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 23:59:48,282 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1007941666, now seen corresponding path program 18 times [2020-10-14 23:59:48,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:48,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40795864] [2020-10-14 23:59:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:48,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:48,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:48,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:49,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:49,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:49,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-14 23:59:49,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:49,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:49,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:59:49,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:49,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:59:49,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:49,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:49,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:49,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:49,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:49,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:49,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:49,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:49,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:49,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:49,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:49,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:49,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40795864] [2020-10-14 23:59:49,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:49,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:59:49,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624109503] [2020-10-14 23:59:49,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:59:49,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:59:49,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:59:49,869 INFO L87 Difference]: Start difference. First operand 535 states and 740 transitions. Second operand 21 states. [2020-10-14 23:59:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:51,071 INFO L93 Difference]: Finished difference Result 1062 states and 1535 transitions. [2020-10-14 23:59:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:59:51,072 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-10-14 23:59:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:51,076 INFO L225 Difference]: With dead ends: 1062 [2020-10-14 23:59:51,076 INFO L226 Difference]: Without dead ends: 978 [2020-10-14 23:59:51,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:59:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-10-14 23:59:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 555. [2020-10-14 23:59:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-10-14 23:59:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 770 transitions. [2020-10-14 23:59:51,100 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 770 transitions. Word has length 33 [2020-10-14 23:59:51,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:51,100 INFO L479 AbstractCegarLoop]: Abstraction has 555 states and 770 transitions. [2020-10-14 23:59:51,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:59:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 770 transitions. [2020-10-14 23:59:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:59:51,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:51,101 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:51,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 23:59:51,101 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:51,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1485273715, now seen corresponding path program 9 times [2020-10-14 23:59:51,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:51,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113230398] [2020-10-14 23:59:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:51,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:53,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:53,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:59:53,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:53,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2304 [2020-10-14 23:59:53,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:53,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:59:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 23:59:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:59:53,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:53,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:53,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:53,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:53,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:53,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:53,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:53,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:53,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:53,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 23:59:53,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113230398] [2020-10-14 23:59:53,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:53,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:59:53,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954481346] [2020-10-14 23:59:53,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:59:53,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:53,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:59:53,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:53,561 INFO L87 Difference]: Start difference. First operand 555 states and 770 transitions. Second operand 11 states. [2020-10-14 23:59:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:58,232 INFO L93 Difference]: Finished difference Result 1106 states and 1328 transitions. [2020-10-14 23:59:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:59:58,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-14 23:59:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:58,294 INFO L225 Difference]: With dead ends: 1106 [2020-10-14 23:59:58,294 INFO L226 Difference]: Without dead ends: 1101 [2020-10-14 23:59:58,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:59:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-10-14 23:59:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 555. [2020-10-14 23:59:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-10-14 23:59:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 766 transitions. [2020-10-14 23:59:58,317 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 766 transitions. Word has length 34 [2020-10-14 23:59:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:58,317 INFO L479 AbstractCegarLoop]: Abstraction has 555 states and 766 transitions. [2020-10-14 23:59:58,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:59:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 766 transitions. [2020-10-14 23:59:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:59:58,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:58,318 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:58,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 23:59:58,319 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:58,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1260680109, now seen corresponding path program 19 times [2020-10-14 23:59:58,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:58,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073587832] [2020-10-14 23:59:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:58,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:58,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:58,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:59,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:59,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:59:59,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:59,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1283 [2020-10-14 23:59:59,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:59,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:59:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:59,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:00,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:00,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:00,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:00,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:00,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:00,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:00,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:00,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:00,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:00,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073587832] [2020-10-15 00:00:00,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:00,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:00:00,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292857766] [2020-10-15 00:00:00,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:00:00,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:00:00,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:00:00,026 INFO L87 Difference]: Start difference. First operand 555 states and 766 transitions. Second operand 22 states. [2020-10-15 00:00:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:01,199 INFO L93 Difference]: Finished difference Result 1182 states and 1670 transitions. [2020-10-15 00:00:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:00:01,200 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 34 [2020-10-15 00:00:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:01,203 INFO L225 Difference]: With dead ends: 1182 [2020-10-15 00:00:01,203 INFO L226 Difference]: Without dead ends: 1094 [2020-10-15 00:00:01,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:00:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-10-15 00:00:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 575. [2020-10-15 00:00:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-10-15 00:00:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 796 transitions. [2020-10-15 00:00:01,227 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 796 transitions. Word has length 34 [2020-10-15 00:00:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:01,227 INFO L479 AbstractCegarLoop]: Abstraction has 575 states and 796 transitions. [2020-10-15 00:00:01,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:00:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 796 transitions. [2020-10-15 00:00:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:00:01,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:01,228 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] [2020-10-15 00:00:01,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-15 00:00:01,228 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:01,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:01,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2123287394, now seen corresponding path program 10 times [2020-10-15 00:00:01,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:01,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948241703] [2020-10-15 00:00:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:01,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:06,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:06,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:00:06,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:00:06,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:00:06,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:06,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:06,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:00:06,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:06,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:00:06,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:06,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:06,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:06,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:06,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:06,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:06,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:06,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:06,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:06,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:06,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:06,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-15 00:00:06,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948241703] [2020-10-15 00:00:06,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:06,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:00:06,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760698064] [2020-10-15 00:00:06,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:00:06,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:06,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:00:06,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:00:06,784 INFO L87 Difference]: Start difference. First operand 575 states and 796 transitions. Second operand 15 states. [2020-10-15 00:00:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:07,288 INFO L93 Difference]: Finished difference Result 594 states and 815 transitions. [2020-10-15 00:00:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:00:07,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-15 00:00:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:07,290 INFO L225 Difference]: With dead ends: 594 [2020-10-15 00:00:07,290 INFO L226 Difference]: Without dead ends: 545 [2020-10-15 00:00:07,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:00:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-10-15 00:00:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2020-10-15 00:00:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-10-15 00:00:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 761 transitions. [2020-10-15 00:00:07,312 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 761 transitions. Word has length 35 [2020-10-15 00:00:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:07,312 INFO L479 AbstractCegarLoop]: Abstraction has 545 states and 761 transitions. [2020-10-15 00:00:07,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:00:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 761 transitions. [2020-10-15 00:00:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:00:07,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:07,313 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:07,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-15 00:00:07,313 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash -625917698, now seen corresponding path program 18 times [2020-10-15 00:00:07,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:07,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173603108] [2020-10-15 00:00:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:07,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:07,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:07,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:07,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:09,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:10,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:10,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:00:10,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:10,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3402 [2020-10-15 00:00:10,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:10,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:10,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:00:10,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:10,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:00:10,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:10,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:10,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:10,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:10,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:10,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:10,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:10,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:10,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:10,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:10,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:10,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:10,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 00:00:10,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173603108] [2020-10-15 00:00:10,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:10,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:00:10,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287614174] [2020-10-15 00:00:10,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:00:10,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:10,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:00:10,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:00:10,962 INFO L87 Difference]: Start difference. First operand 545 states and 761 transitions. Second operand 16 states. [2020-10-15 00:00:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:11,573 INFO L93 Difference]: Finished difference Result 682 states and 919 transitions. [2020-10-15 00:00:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:00:11,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-15 00:00:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:11,576 INFO L225 Difference]: With dead ends: 682 [2020-10-15 00:00:11,576 INFO L226 Difference]: Without dead ends: 664 [2020-10-15 00:00:11,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:00:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2020-10-15 00:00:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 545. [2020-10-15 00:00:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-10-15 00:00:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 760 transitions. [2020-10-15 00:00:11,600 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 760 transitions. Word has length 35 [2020-10-15 00:00:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:11,600 INFO L479 AbstractCegarLoop]: Abstraction has 545 states and 760 transitions. [2020-10-15 00:00:11,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:00:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 760 transitions. [2020-10-15 00:00:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:00:11,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:11,601 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:11,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-15 00:00:11,601 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1335817698, now seen corresponding path program 19 times [2020-10-15 00:00:11,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:11,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776793871] [2020-10-15 00:00:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:11,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:11,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:11,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:11,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:12,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:12,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:14,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:16,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:16,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:00:16,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 00:00:16,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 00:00:16,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:16,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:00:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:00:16,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:16,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:16,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:16,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:16,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:16,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:16,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:16,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:16,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:16,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:16,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-15 00:00:16,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776793871] [2020-10-15 00:00:16,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:16,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:00:16,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506847112] [2020-10-15 00:00:16,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:00:16,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:00:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:00:16,819 INFO L87 Difference]: Start difference. First operand 545 states and 760 transitions. Second operand 13 states. [2020-10-15 00:00:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:17,242 INFO L93 Difference]: Finished difference Result 618 states and 847 transitions. [2020-10-15 00:00:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:00:17,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-15 00:00:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:17,246 INFO L225 Difference]: With dead ends: 618 [2020-10-15 00:00:17,246 INFO L226 Difference]: Without dead ends: 613 [2020-10-15 00:00:17,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:00:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2020-10-15 00:00:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 588. [2020-10-15 00:00:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2020-10-15 00:00:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 816 transitions. [2020-10-15 00:00:17,285 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 816 transitions. Word has length 35 [2020-10-15 00:00:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:17,285 INFO L479 AbstractCegarLoop]: Abstraction has 588 states and 816 transitions. [2020-10-15 00:00:17,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:00:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 816 transitions. [2020-10-15 00:00:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:00:17,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:17,287 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:17,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-15 00:00:17,287 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:17,288 INFO L82 PathProgramCache]: Analyzing trace with hash 199620862, now seen corresponding path program 7 times [2020-10-15 00:00:17,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:17,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564713575] [2020-10-15 00:00:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:17,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:18,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:22,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:00:22,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:22,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:00:22,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:22,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:22,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:00:22,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 00:00:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:00:22,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:22,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:22,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:22,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:22,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:22,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:22,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:22,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:22,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:22,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:22,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:22,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-15 00:00:22,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564713575] [2020-10-15 00:00:22,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:22,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:00:22,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285064092] [2020-10-15 00:00:22,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:00:22,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:22,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:00:22,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:00:22,466 INFO L87 Difference]: Start difference. First operand 588 states and 816 transitions. Second operand 11 states. [2020-10-15 00:00:22,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:22,829 INFO L93 Difference]: Finished difference Result 755 states and 1083 transitions. [2020-10-15 00:00:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:00:22,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-15 00:00:22,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:22,832 INFO L225 Difference]: With dead ends: 755 [2020-10-15 00:00:22,832 INFO L226 Difference]: Without dead ends: 727 [2020-10-15 00:00:22,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:00:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-10-15 00:00:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 637. [2020-10-15 00:00:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-15 00:00:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 881 transitions. [2020-10-15 00:00:22,857 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 881 transitions. Word has length 35 [2020-10-15 00:00:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:22,857 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 881 transitions. [2020-10-15 00:00:22,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:00:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 881 transitions. [2020-10-15 00:00:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:00:22,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:22,859 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:22,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-15 00:00:22,859 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:22,859 INFO L82 PathProgramCache]: Analyzing trace with hash 484826766, now seen corresponding path program 20 times [2020-10-15 00:00:22,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:22,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533487596] [2020-10-15 00:00:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:22,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:23,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:24,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:26,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:26,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:00:26,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:26,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3192 [2020-10-15 00:00:26,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:26,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:26,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:00:26,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:26,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:00:26,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:26,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:26,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:26,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:26,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:26,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:26,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:26,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:26,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:26,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:26,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:26,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:26,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:00:26,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533487596] [2020-10-15 00:00:26,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:26,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:00:26,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2701998] [2020-10-15 00:00:26,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:00:26,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:26,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:00:26,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:00:26,369 INFO L87 Difference]: Start difference. First operand 637 states and 881 transitions. Second operand 18 states. [2020-10-15 00:00:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:27,155 INFO L93 Difference]: Finished difference Result 849 states and 1129 transitions. [2020-10-15 00:00:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:00:27,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-15 00:00:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:27,158 INFO L225 Difference]: With dead ends: 849 [2020-10-15 00:00:27,158 INFO L226 Difference]: Without dead ends: 831 [2020-10-15 00:00:27,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:00:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-10-15 00:00:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 637. [2020-10-15 00:00:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-15 00:00:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 880 transitions. [2020-10-15 00:00:27,186 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 880 transitions. Word has length 35 [2020-10-15 00:00:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:27,186 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 880 transitions. [2020-10-15 00:00:27,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:00:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 880 transitions. [2020-10-15 00:00:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:00:27,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:27,187 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:27,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-15 00:00:27,187 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:27,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2044677886, now seen corresponding path program 21 times [2020-10-15 00:00:27,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:27,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726245842] [2020-10-15 00:00:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:27,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:27,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:27,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:27,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:28,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:29,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:29,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:00:29,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:29,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2305 [2020-10-15 00:00:29,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:29,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:00:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:00:29,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:29,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:29,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:29,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:29,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:29,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:29,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:29,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:29,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:29,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:29,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:29,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:29,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 00:00:29,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726245842] [2020-10-15 00:00:29,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:29,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:00:29,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596631907] [2020-10-15 00:00:29,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:00:29,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:00:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:00:29,861 INFO L87 Difference]: Start difference. First operand 637 states and 880 transitions. Second operand 20 states. [2020-10-15 00:00:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:30,667 INFO L93 Difference]: Finished difference Result 877 states and 1159 transitions. [2020-10-15 00:00:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:00:30,668 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-10-15 00:00:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:30,669 INFO L225 Difference]: With dead ends: 877 [2020-10-15 00:00:30,670 INFO L226 Difference]: Without dead ends: 859 [2020-10-15 00:00:30,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-10-15 00:00:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 637. [2020-10-15 00:00:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-15 00:00:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 879 transitions. [2020-10-15 00:00:30,697 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 879 transitions. Word has length 35 [2020-10-15 00:00:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:30,697 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 879 transitions. [2020-10-15 00:00:30,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:00:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 879 transitions. [2020-10-15 00:00:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:00:30,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:30,698 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:30,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-15 00:00:30,699 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash -121761650, now seen corresponding path program 22 times [2020-10-15 00:00:30,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:30,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322785562] [2020-10-15 00:00:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:30,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:30,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:30,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:31,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:31,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:32,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:32,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:00:32,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:32,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2116 [2020-10-15 00:00:32,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:32,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:00:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:00:32,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:33,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:33,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:33,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:33,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:33,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:33,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:33,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:33,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:33,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:33,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:33,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322785562] [2020-10-15 00:00:33,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:33,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:00:33,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289033004] [2020-10-15 00:00:33,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:00:33,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:33,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:00:33,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:00:33,249 INFO L87 Difference]: Start difference. First operand 637 states and 879 transitions. Second operand 22 states. [2020-10-15 00:00:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:34,144 INFO L93 Difference]: Finished difference Result 906 states and 1190 transitions. [2020-10-15 00:00:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:00:34,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-15 00:00:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:34,148 INFO L225 Difference]: With dead ends: 906 [2020-10-15 00:00:34,148 INFO L226 Difference]: Without dead ends: 888 [2020-10-15 00:00:34,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:00:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2020-10-15 00:00:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 637. [2020-10-15 00:00:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-15 00:00:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 878 transitions. [2020-10-15 00:00:34,217 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 878 transitions. Word has length 35 [2020-10-15 00:00:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:34,217 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 878 transitions. [2020-10-15 00:00:34,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:00:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 878 transitions. [2020-10-15 00:00:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:00:34,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:34,220 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:34,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-15 00:00:34,220 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:34,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1992762114, now seen corresponding path program 8 times [2020-10-15 00:00:34,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:34,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489599708] [2020-10-15 00:00:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:34,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:34,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:34,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:34,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:34,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:35,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:35,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:00:35,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:35,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1604 [2020-10-15 00:00:35,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:35,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:35,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:00:35,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:35,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:00:35,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:36,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:36,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:36,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:36,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:36,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:36,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:36,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:36,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:36,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:36,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:36,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:36,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489599708] [2020-10-15 00:00:36,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:36,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:00:36,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836704892] [2020-10-15 00:00:36,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:00:36,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:36,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:00:36,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:00:36,354 INFO L87 Difference]: Start difference. First operand 637 states and 878 transitions. Second operand 24 states. [2020-10-15 00:00:37,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:37,316 INFO L93 Difference]: Finished difference Result 936 states and 1222 transitions. [2020-10-15 00:00:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:00:37,317 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-15 00:00:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:37,318 INFO L225 Difference]: With dead ends: 936 [2020-10-15 00:00:37,318 INFO L226 Difference]: Without dead ends: 918 [2020-10-15 00:00:37,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:00:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2020-10-15 00:00:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 637. [2020-10-15 00:00:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-15 00:00:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 877 transitions. [2020-10-15 00:00:37,348 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 877 transitions. Word has length 35 [2020-10-15 00:00:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:37,348 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 877 transitions. [2020-10-15 00:00:37,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:00:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 877 transitions. [2020-10-15 00:00:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:00:37,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:37,349 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:37,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-15 00:00:37,350 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:37,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1426488898, now seen corresponding path program 20 times [2020-10-15 00:00:37,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:37,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322282015] [2020-10-15 00:00:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:37,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:38,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:38,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:00:38,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:38,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-15 00:00:38,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:38,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:00:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:00:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:38,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:38,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:38,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:38,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:38,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:38,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:38,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:38,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:38,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:38,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322282015] [2020-10-15 00:00:38,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:38,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:00:38,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596125880] [2020-10-15 00:00:38,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:00:38,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:38,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:00:38,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:00:38,716 INFO L87 Difference]: Start difference. First operand 637 states and 877 transitions. Second operand 23 states. [2020-10-15 00:00:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:39,968 INFO L93 Difference]: Finished difference Result 1218 states and 1761 transitions. [2020-10-15 00:00:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:00:39,969 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 00:00:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:39,970 INFO L225 Difference]: With dead ends: 1218 [2020-10-15 00:00:39,971 INFO L226 Difference]: Without dead ends: 1122 [2020-10-15 00:00:39,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:00:39,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-10-15 00:00:39,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 659. [2020-10-15 00:00:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2020-10-15 00:00:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 910 transitions. [2020-10-15 00:00:39,996 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 910 transitions. Word has length 35 [2020-10-15 00:00:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:39,997 INFO L479 AbstractCegarLoop]: Abstraction has 659 states and 910 transitions. [2020-10-15 00:00:39,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:00:39,997 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 910 transitions. [2020-10-15 00:00:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:00:39,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:39,998 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:39,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-15 00:00:39,998 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash -963321682, now seen corresponding path program 23 times [2020-10-15 00:00:39,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:39,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054214654] [2020-10-15 00:00:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:40,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:40,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:40,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:40,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:40,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:45,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:45,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:00:45,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:45,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:00:45,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:45,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:45,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:00:45,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 00:00:45,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:00:45,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:45,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:45,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:45,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:45,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:45,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:45,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:45,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:45,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:45,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-15 00:00:45,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054214654] [2020-10-15 00:00:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:45,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:00:45,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756718131] [2020-10-15 00:00:45,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:00:45,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:00:45,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:00:45,238 INFO L87 Difference]: Start difference. First operand 659 states and 910 transitions. Second operand 12 states. [2020-10-15 00:00:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:45,660 INFO L93 Difference]: Finished difference Result 832 states and 1187 transitions. [2020-10-15 00:00:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:00:45,660 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-15 00:00:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:45,662 INFO L225 Difference]: With dead ends: 832 [2020-10-15 00:00:45,662 INFO L226 Difference]: Without dead ends: 809 [2020-10-15 00:00:45,662 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 [2020-10-15 00:00:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2020-10-15 00:00:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 717. [2020-10-15 00:00:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-10-15 00:00:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 992 transitions. [2020-10-15 00:00:45,689 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 992 transitions. Word has length 36 [2020-10-15 00:00:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:45,689 INFO L479 AbstractCegarLoop]: Abstraction has 717 states and 992 transitions. [2020-10-15 00:00:45,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:00:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 992 transitions. [2020-10-15 00:00:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:00:45,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:45,690 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:45,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-15 00:00:45,690 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:45,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1170617805, now seen corresponding path program 21 times [2020-10-15 00:00:45,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:45,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953815008] [2020-10-15 00:00:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:45,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:45,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:48,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:00:48,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:48,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2533 [2020-10-15 00:00:48,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:48,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:48,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:00:48,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:48,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:48,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:48,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:48,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:48,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:48,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:48,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:48,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:48,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:48,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:48,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:48,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:48,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:48,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953815008] [2020-10-15 00:00:48,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:48,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:00:48,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766579218] [2020-10-15 00:00:48,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:00:48,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:48,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:00:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:00:48,740 INFO L87 Difference]: Start difference. First operand 717 states and 992 transitions. Second operand 24 states. [2020-10-15 00:00:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:50,145 INFO L93 Difference]: Finished difference Result 1365 states and 1979 transitions. [2020-10-15 00:00:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:00:50,146 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2020-10-15 00:00:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:50,148 INFO L225 Difference]: With dead ends: 1365 [2020-10-15 00:00:50,148 INFO L226 Difference]: Without dead ends: 1261 [2020-10-15 00:00:50,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:00:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2020-10-15 00:00:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 741. [2020-10-15 00:00:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2020-10-15 00:00:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1028 transitions. [2020-10-15 00:00:50,195 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1028 transitions. Word has length 36 [2020-10-15 00:00:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:50,196 INFO L479 AbstractCegarLoop]: Abstraction has 741 states and 1028 transitions. [2020-10-15 00:00:50,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:00:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1028 transitions. [2020-10-15 00:00:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:00:50,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:50,198 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:50,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-15 00:00:50,199 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2122738658, now seen corresponding path program 24 times [2020-10-15 00:00:50,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:50,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802203956] [2020-10-15 00:00:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:50,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:50,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:50,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:50,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:53,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:53,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:00:53,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3580 [2020-10-15 00:00:53,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:53,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:00:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:00:53,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:54,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:54,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:54,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:54,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:54,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:54,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:54,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:54,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 00:00:54,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802203956] [2020-10-15 00:00:54,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:54,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:00:54,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452093886] [2020-10-15 00:00:54,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:00:54,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:54,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:00:54,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:00:54,046 INFO L87 Difference]: Start difference. First operand 741 states and 1028 transitions. Second operand 16 states. [2020-10-15 00:00:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:54,744 INFO L93 Difference]: Finished difference Result 897 states and 1217 transitions. [2020-10-15 00:00:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:00:54,744 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-15 00:00:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:54,746 INFO L225 Difference]: With dead ends: 897 [2020-10-15 00:00:54,746 INFO L226 Difference]: Without dead ends: 855 [2020-10-15 00:00:54,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:00:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-10-15 00:00:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 728. [2020-10-15 00:00:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 728 states. [2020-10-15 00:00:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1013 transitions. [2020-10-15 00:00:54,792 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1013 transitions. Word has length 37 [2020-10-15 00:00:54,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:54,792 INFO L479 AbstractCegarLoop]: Abstraction has 728 states and 1013 transitions. [2020-10-15 00:00:54,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:00:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1013 transitions. [2020-10-15 00:00:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:00:54,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:54,794 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:54,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-15 00:00:54,794 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1994120222, now seen corresponding path program 25 times [2020-10-15 00:00:54,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:54,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101844668] [2020-10-15 00:00:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:54,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:55,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:55,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:55,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:59,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:59,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:00:59,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:00:59,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:59,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:00:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 00:00:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:00:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:00,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:00,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:00,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:00,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:00,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:00,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:00,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:00,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:00,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:00,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:00,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-15 00:01:00,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101844668] [2020-10-15 00:01:00,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:00,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:01:00,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244642898] [2020-10-15 00:01:00,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:01:00,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:00,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:01:00,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:01:00,041 INFO L87 Difference]: Start difference. First operand 728 states and 1013 transitions. Second operand 13 states. [2020-10-15 00:01:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:01,658 INFO L93 Difference]: Finished difference Result 912 states and 1310 transitions. [2020-10-15 00:01:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:01:01,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-15 00:01:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:01,663 INFO L225 Difference]: With dead ends: 912 [2020-10-15 00:01:01,664 INFO L226 Difference]: Without dead ends: 889 [2020-10-15 00:01:01,664 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 [2020-10-15 00:01:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-10-15 00:01:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 788. [2020-10-15 00:01:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2020-10-15 00:01:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1098 transitions. [2020-10-15 00:01:01,711 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1098 transitions. Word has length 37 [2020-10-15 00:01:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:01,711 INFO L479 AbstractCegarLoop]: Abstraction has 788 states and 1098 transitions. [2020-10-15 00:01:01,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:01:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1098 transitions. [2020-10-15 00:01:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:01:01,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:01,714 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:01,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-15 00:01:01,714 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:01,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:01,715 INFO L82 PathProgramCache]: Analyzing trace with hash 264412528, now seen corresponding path program 26 times [2020-10-15 00:01:01,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:01,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047431070] [2020-10-15 00:01:01,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:01,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:01,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:02,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:03,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:04,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:06,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:06,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:01:06,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:06,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4315 [2020-10-15 00:01:06,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:06,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:01:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:01:06,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:06,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:06,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:06,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:06,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:06,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:06,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:06,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:06,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:06,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:06,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:06,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:06,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 00:01:06,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047431070] [2020-10-15 00:01:06,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:06,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:01:06,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551228157] [2020-10-15 00:01:06,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:01:06,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:06,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:01:06,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:01:06,358 INFO L87 Difference]: Start difference. First operand 788 states and 1098 transitions. Second operand 18 states. [2020-10-15 00:01:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:07,215 INFO L93 Difference]: Finished difference Result 1018 states and 1358 transitions. [2020-10-15 00:01:07,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:01:07,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-15 00:01:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:07,218 INFO L225 Difference]: With dead ends: 1018 [2020-10-15 00:01:07,218 INFO L226 Difference]: Without dead ends: 999 [2020-10-15 00:01:07,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:01:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2020-10-15 00:01:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 788. [2020-10-15 00:01:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2020-10-15 00:01:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1097 transitions. [2020-10-15 00:01:07,265 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1097 transitions. Word has length 37 [2020-10-15 00:01:07,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:07,266 INFO L479 AbstractCegarLoop]: Abstraction has 788 states and 1097 transitions. [2020-10-15 00:01:07,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:01:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1097 transitions. [2020-10-15 00:01:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:01:07,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:07,267 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:07,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-15 00:01:07,267 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:07,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1449796062, now seen corresponding path program 27 times [2020-10-15 00:01:07,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:07,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823859640] [2020-10-15 00:01:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:07,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:07,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:07,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:08,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:08,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:10,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:10,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:01:10,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:10,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3713 [2020-10-15 00:01:10,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:10,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:10,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:01:10,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:10,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:01:10,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:11,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:11,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:11,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:11,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:11,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:11,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:11,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:11,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:11,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:11,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:11,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:11,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:01:11,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823859640] [2020-10-15 00:01:11,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:11,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:01:11,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734957549] [2020-10-15 00:01:11,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:01:11,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:11,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:01:11,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:01:11,366 INFO L87 Difference]: Start difference. First operand 788 states and 1097 transitions. Second operand 20 states. [2020-10-15 00:01:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:12,300 INFO L93 Difference]: Finished difference Result 1052 states and 1394 transitions. [2020-10-15 00:01:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:01:12,301 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-15 00:01:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:12,302 INFO L225 Difference]: With dead ends: 1052 [2020-10-15 00:01:12,303 INFO L226 Difference]: Without dead ends: 1033 [2020-10-15 00:01:12,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:01:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2020-10-15 00:01:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 788. [2020-10-15 00:01:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2020-10-15 00:01:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1096 transitions. [2020-10-15 00:01:12,336 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1096 transitions. Word has length 37 [2020-10-15 00:01:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:12,336 INFO L479 AbstractCegarLoop]: Abstraction has 788 states and 1096 transitions. [2020-10-15 00:01:12,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:01:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1096 transitions. [2020-10-15 00:01:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:01:12,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:12,337 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:12,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-15 00:01:12,337 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash 933844912, now seen corresponding path program 28 times [2020-10-15 00:01:12,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:12,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226881559] [2020-10-15 00:01:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:12,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:12,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:12,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:13,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:15,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:01:15,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:15,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2817 [2020-10-15 00:01:15,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:15,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:15,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:01:15,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:15,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:01:15,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:15,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:15,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:15,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:15,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:15,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:15,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:15,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:15,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 00:01:15,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226881559] [2020-10-15 00:01:15,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:15,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:01:15,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680709842] [2020-10-15 00:01:15,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:01:15,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:15,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:01:15,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:01:15,608 INFO L87 Difference]: Start difference. First operand 788 states and 1096 transitions. Second operand 22 states. [2020-10-15 00:01:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:16,599 INFO L93 Difference]: Finished difference Result 1085 states and 1429 transitions. [2020-10-15 00:01:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:01:16,599 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-10-15 00:01:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:16,601 INFO L225 Difference]: With dead ends: 1085 [2020-10-15 00:01:16,601 INFO L226 Difference]: Without dead ends: 1066 [2020-10-15 00:01:16,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:01:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-10-15 00:01:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 788. [2020-10-15 00:01:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2020-10-15 00:01:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1095 transitions. [2020-10-15 00:01:16,650 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1095 transitions. Word has length 37 [2020-10-15 00:01:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:16,650 INFO L479 AbstractCegarLoop]: Abstraction has 788 states and 1095 transitions. [2020-10-15 00:01:16,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:01:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1095 transitions. [2020-10-15 00:01:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:01:16,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:16,652 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:16,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-15 00:01:16,653 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 363011998, now seen corresponding path program 29 times [2020-10-15 00:01:16,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:16,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532548566] [2020-10-15 00:01:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:16,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:16,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:19,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:01:19,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:19,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2414 [2020-10-15 00:01:19,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:19,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:19,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:01:19,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:19,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:01:19,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:19,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:19,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:19,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:19,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:19,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:19,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:19,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:19,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:19,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532548566] [2020-10-15 00:01:19,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:19,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:01:19,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918881102] [2020-10-15 00:01:19,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:01:19,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:19,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:01:19,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:01:19,607 INFO L87 Difference]: Start difference. First operand 788 states and 1095 transitions. Second operand 24 states. [2020-10-15 00:01:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:20,646 INFO L93 Difference]: Finished difference Result 1117 states and 1463 transitions. [2020-10-15 00:01:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:01:20,646 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2020-10-15 00:01:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:20,648 INFO L225 Difference]: With dead ends: 1117 [2020-10-15 00:01:20,648 INFO L226 Difference]: Without dead ends: 1098 [2020-10-15 00:01:20,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:01:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2020-10-15 00:01:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 788. [2020-10-15 00:01:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2020-10-15 00:01:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1094 transitions. [2020-10-15 00:01:20,679 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1094 transitions. Word has length 37 [2020-10-15 00:01:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:20,680 INFO L479 AbstractCegarLoop]: Abstraction has 788 states and 1094 transitions. [2020-10-15 00:01:20,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:01:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1094 transitions. [2020-10-15 00:01:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:01:20,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:20,681 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:20,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-15 00:01:20,681 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:20,681 INFO L82 PathProgramCache]: Analyzing trace with hash -763780624, now seen corresponding path program 9 times [2020-10-15 00:01:20,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:20,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539387015] [2020-10-15 00:01:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:20,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:20,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:20,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:21,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:21,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:21,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:01:21,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:21,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1234 [2020-10-15 00:01:21,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:21,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:01:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:01:21,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:22,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:22,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:22,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:22,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:22,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:22,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:22,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:22,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:22,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:22,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:22,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:22,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539387015] [2020-10-15 00:01:22,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:22,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:01:22,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114311077] [2020-10-15 00:01:22,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:01:22,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:01:22,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:01:22,536 INFO L87 Difference]: Start difference. First operand 788 states and 1094 transitions. Second operand 26 states. [2020-10-15 00:01:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:23,693 INFO L93 Difference]: Finished difference Result 1150 states and 1498 transitions. [2020-10-15 00:01:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:01:23,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-15 00:01:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:23,695 INFO L225 Difference]: With dead ends: 1150 [2020-10-15 00:01:23,695 INFO L226 Difference]: Without dead ends: 1131 [2020-10-15 00:01:23,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:01:23,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2020-10-15 00:01:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 788. [2020-10-15 00:01:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2020-10-15 00:01:23,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1093 transitions. [2020-10-15 00:01:23,730 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1093 transitions. Word has length 37 [2020-10-15 00:01:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:23,730 INFO L479 AbstractCegarLoop]: Abstraction has 788 states and 1093 transitions. [2020-10-15 00:01:23,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:01:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1093 transitions. [2020-10-15 00:01:23,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:01:23,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:23,732 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:23,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-15 00:01:23,733 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:23,733 INFO L82 PathProgramCache]: Analyzing trace with hash 76546974, now seen corresponding path program 22 times [2020-10-15 00:01:23,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:23,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660870619] [2020-10-15 00:01:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:23,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:25,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:01:25,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:25,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2070 [2020-10-15 00:01:25,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:25,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:01:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:01:25,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:26,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:26,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:26,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:26,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:26,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:26,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:26,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:26,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:26,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:26,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:26,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660870619] [2020-10-15 00:01:26,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:26,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-15 00:01:26,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925576036] [2020-10-15 00:01:26,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 00:01:26,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:26,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 00:01:26,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:01:26,327 INFO L87 Difference]: Start difference. First operand 788 states and 1093 transitions. Second operand 25 states. [2020-10-15 00:01:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:27,896 INFO L93 Difference]: Finished difference Result 1489 states and 2165 transitions. [2020-10-15 00:01:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:01:27,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2020-10-15 00:01:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:27,898 INFO L225 Difference]: With dead ends: 1489 [2020-10-15 00:01:27,898 INFO L226 Difference]: Without dead ends: 1377 [2020-10-15 00:01:27,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:01:27,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2020-10-15 00:01:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 814. [2020-10-15 00:01:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-10-15 00:01:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1132 transitions. [2020-10-15 00:01:27,937 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1132 transitions. Word has length 37 [2020-10-15 00:01:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:27,938 INFO L479 AbstractCegarLoop]: Abstraction has 814 states and 1132 transitions. [2020-10-15 00:01:27,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 00:01:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1132 transitions. [2020-10-15 00:01:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:01:27,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:27,939 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:27,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-15 00:01:27,940 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:27,940 INFO L82 PathProgramCache]: Analyzing trace with hash -814461266, now seen corresponding path program 30 times [2020-10-15 00:01:27,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:27,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847631684] [2020-10-15 00:01:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:27,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:32,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:01:32,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:32,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 00:01:32,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:32,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:32,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:01:32,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 00:01:32,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:01:32,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:33,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:33,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:33,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:33,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:33,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:33,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:33,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:33,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:33,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:33,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:33,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-15 00:01:33,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847631684] [2020-10-15 00:01:33,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:33,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:01:33,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006105443] [2020-10-15 00:01:33,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:01:33,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:33,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:01:33,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:01:33,251 INFO L87 Difference]: Start difference. First operand 814 states and 1132 transitions. Second operand 14 states. [2020-10-15 00:01:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:34,009 INFO L93 Difference]: Finished difference Result 1009 states and 1449 transitions. [2020-10-15 00:01:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:01:34,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-15 00:01:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:34,011 INFO L225 Difference]: With dead ends: 1009 [2020-10-15 00:01:34,011 INFO L226 Difference]: Without dead ends: 986 [2020-10-15 00:01:34,012 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 [2020-10-15 00:01:34,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-10-15 00:01:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 876. [2020-10-15 00:01:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2020-10-15 00:01:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1220 transitions. [2020-10-15 00:01:34,047 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1220 transitions. Word has length 38 [2020-10-15 00:01:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:34,047 INFO L479 AbstractCegarLoop]: Abstraction has 876 states and 1220 transitions. [2020-10-15 00:01:34,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:01:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1220 transitions. [2020-10-15 00:01:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:01:34,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:34,049 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:34,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-15 00:01:34,049 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:34,049 INFO L82 PathProgramCache]: Analyzing trace with hash 520089581, now seen corresponding path program 23 times [2020-10-15 00:01:34,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:34,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310590880] [2020-10-15 00:01:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:34,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:36,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:01:36,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:36,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2626 [2020-10-15 00:01:36,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:36,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:36,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:01:36,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:36,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:01:36,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:37,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:37,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:37,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:37,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:37,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:37,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:37,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:37,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:37,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:37,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310590880] [2020-10-15 00:01:37,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:37,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:01:37,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334881261] [2020-10-15 00:01:37,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:01:37,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:37,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:01:37,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:01:37,296 INFO L87 Difference]: Start difference. First operand 876 states and 1220 transitions. Second operand 26 states. [2020-10-15 00:01:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:39,065 INFO L93 Difference]: Finished difference Result 1652 states and 2407 transitions. [2020-10-15 00:01:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:01:39,066 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2020-10-15 00:01:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:39,067 INFO L225 Difference]: With dead ends: 1652 [2020-10-15 00:01:39,067 INFO L226 Difference]: Without dead ends: 1532 [2020-10-15 00:01:39,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:01:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2020-10-15 00:01:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 904. [2020-10-15 00:01:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-10-15 00:01:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1262 transitions. [2020-10-15 00:01:39,128 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1262 transitions. Word has length 38 [2020-10-15 00:01:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:39,128 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1262 transitions. [2020-10-15 00:01:39,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:01:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1262 transitions. [2020-10-15 00:01:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:01:39,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:39,130 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:39,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-15 00:01:39,131 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1108702978, now seen corresponding path program 31 times [2020-10-15 00:01:39,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:39,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225423876] [2020-10-15 00:01:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:39,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:39,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:39,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:39,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:01:39,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:39,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-15 00:01:39,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:39,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:01:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 00:01:39,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:01:39,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:39,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:39,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:39,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:39,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:39,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:39,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:39,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:39,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:39,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:39,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:39,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:39,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-15 00:01:39,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225423876] [2020-10-15 00:01:39,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:39,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:01:39,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762117800] [2020-10-15 00:01:39,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:01:39,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:39,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:01:39,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:01:39,791 INFO L87 Difference]: Start difference. First operand 904 states and 1262 transitions. Second operand 9 states. [2020-10-15 00:01:40,268 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-15 00:01:44,030 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-15 00:01:44,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:44,563 INFO L93 Difference]: Finished difference Result 2245 states and 2623 transitions. [2020-10-15 00:01:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:01:44,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-15 00:01:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:44,567 INFO L225 Difference]: With dead ends: 2245 [2020-10-15 00:01:44,567 INFO L226 Difference]: Without dead ends: 2240 [2020-10-15 00:01:44,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:01:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2020-10-15 00:01:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 965. [2020-10-15 00:01:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2020-10-15 00:01:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1336 transitions. [2020-10-15 00:01:44,642 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1336 transitions. Word has length 39 [2020-10-15 00:01:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:44,643 INFO L479 AbstractCegarLoop]: Abstraction has 965 states and 1336 transitions. [2020-10-15 00:01:44,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:01:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1336 transitions. [2020-10-15 00:01:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:01:44,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:44,644 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:44,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-15 00:01:44,644 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:44,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1341985202, now seen corresponding path program 32 times [2020-10-15 00:01:44,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:44,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485665116] [2020-10-15 00:01:44,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:44,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:44,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:44,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:45,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:47,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:49,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:01:49,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:49,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 00:01:49,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:49,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:49,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:01:49,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:49,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:01:49,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:49,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:49,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:49,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:49,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:49,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:49,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:49,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:49,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 00:01:49,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485665116] [2020-10-15 00:01:49,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:49,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:01:49,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941243684] [2020-10-15 00:01:49,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:01:49,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:49,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:01:49,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:01:49,987 INFO L87 Difference]: Start difference. First operand 965 states and 1336 transitions. Second operand 18 states. [2020-10-15 00:01:51,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:51,046 INFO L93 Difference]: Finished difference Result 1239 states and 1647 transitions. [2020-10-15 00:01:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:01:51,047 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-15 00:01:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:51,048 INFO L225 Difference]: With dead ends: 1239 [2020-10-15 00:01:51,048 INFO L226 Difference]: Without dead ends: 1219 [2020-10-15 00:01:51,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:01:51,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2020-10-15 00:01:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 965. [2020-10-15 00:01:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2020-10-15 00:01:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1335 transitions. [2020-10-15 00:01:51,135 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1335 transitions. Word has length 39 [2020-10-15 00:01:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:51,136 INFO L479 AbstractCegarLoop]: Abstraction has 965 states and 1335 transitions. [2020-10-15 00:01:51,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:01:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1335 transitions. [2020-10-15 00:01:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:01:51,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:51,138 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:51,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-10-15 00:01:51,138 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:51,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:51,138 INFO L82 PathProgramCache]: Analyzing trace with hash -241131778, now seen corresponding path program 33 times [2020-10-15 00:01:51,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:51,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080782852] [2020-10-15 00:01:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:51,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:54,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking...