/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/copysome2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:20:04,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:20:04,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:20:04,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:20:04,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:20:04,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:20:04,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:20:04,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:20:04,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:20:04,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:20:04,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:20:04,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:20:04,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:20:04,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:20:04,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:20:04,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:20:04,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:20:04,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:20:04,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:20:04,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:20:04,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:20:04,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:20:04,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:20:04,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:20:04,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:20:04,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:20:04,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:20:04,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:20:04,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:20:04,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:20:04,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:20:04,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:20:04,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:20:04,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:20:04,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:20:04,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:20:04,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:20:04,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:20:04,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:20:04,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:20:04,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:20:04,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:20:04,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:20:04,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:20:04,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:20:04,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:20:04,868 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:20:04,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:20:04,869 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:20:04,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:20:04,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:20:04,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:20:04,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:20:04,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:20:04,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:20:04,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:20:04,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:20:04,872 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:20:04,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:20:04,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:20:04,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:20:04,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:20:04,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:20:04,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:20:04,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:20:04,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:20:04,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:20:04,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:20:04,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:20:04,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:20:04,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:20:04,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:20:05,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:20:05,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:20:05,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:20:05,213 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:20:05,214 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:20:05,214 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-2.i [2020-10-13 05:20:05,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afe94aeb5/29d67cb3041742548adc957702c767cc/FLAG9235c600c [2020-10-13 05:20:05,718 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:20:05,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome2-2.i [2020-10-13 05:20:05,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afe94aeb5/29d67cb3041742548adc957702c767cc/FLAG9235c600c [2020-10-13 05:20:06,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afe94aeb5/29d67cb3041742548adc957702c767cc [2020-10-13 05:20:06,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:20:06,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:20:06,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:06,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:20:06,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:20:06,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:06" (1/1) ... [2020-10-13 05:20:06,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ecc4458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06, skipping insertion in model container [2020-10-13 05:20:06,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:06" (1/1) ... [2020-10-13 05:20:06,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:20:06,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:20:06,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:06,380 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:20:06,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:06,427 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:20:06,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06 WrapperNode [2020-10-13 05:20:06,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:06,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:20:06,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:20:06,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:20:06,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06" (1/1) ... [2020-10-13 05:20:06,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06" (1/1) ... [2020-10-13 05:20:06,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06" (1/1) ... [2020-10-13 05:20:06,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06" (1/1) ... [2020-10-13 05:20:06,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06" (1/1) ... [2020-10-13 05:20:06,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06" (1/1) ... [2020-10-13 05:20:06,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06" (1/1) ... [2020-10-13 05:20:06,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:20:06,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:20:06,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:20:06,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:20:06,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:20:06,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:20:06,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:20:06,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:20:06,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:20:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:20:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:20:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:20:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:20:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:20:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:20:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:20:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:20:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:20:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:20:06,957 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:20:06,959 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 05:20:06,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:06 BoogieIcfgContainer [2020-10-13 05:20:06,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:20:06,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:20:06,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:20:06,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:20:06,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:20:06" (1/3) ... [2020-10-13 05:20:06,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7c7935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:06, skipping insertion in model container [2020-10-13 05:20:06,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:06" (2/3) ... [2020-10-13 05:20:06,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7c7935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:06, skipping insertion in model container [2020-10-13 05:20:06,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:06" (3/3) ... [2020-10-13 05:20:06,986 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2020-10-13 05:20:06,994 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:20:07,006 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:20:07,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:20:07,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:20:07,042 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:20:07,042 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:20:07,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:20:07,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:20:07,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:20:07,043 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:20:07,043 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:20:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-13 05:20:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 05:20:07,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:07,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:07,070 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:07,076 INFO L82 PathProgramCache]: Analyzing trace with hash 696803616, now seen corresponding path program 1 times [2020-10-13 05:20:07,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:07,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454543425] [2020-10-13 05:20:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:07,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:07,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:20:07,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:20:07,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-13 05:20:07,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:07,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:07,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 05:20:07,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:07,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 05:20:07,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:07,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:07,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:07,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:07,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 05:20:07,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:07,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:07,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:07,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:07,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454543425] [2020-10-13 05:20:07,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:07,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:20:07,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499910177] [2020-10-13 05:20:07,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:20:07,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:07,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:20:07,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:20:07,523 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-13 05:20:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:07,672 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-10-13 05:20:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:20:07,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 05:20:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:07,683 INFO L225 Difference]: With dead ends: 56 [2020-10-13 05:20:07,683 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 05:20:07,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:20:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 05:20:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 05:20:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 05:20:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-13 05:20:07,726 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2020-10-13 05:20:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:07,727 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-13 05:20:07,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:20:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-13 05:20:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 05:20:07,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:07,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:07,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:20:07,729 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash 123133892, now seen corresponding path program 1 times [2020-10-13 05:20:07,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:07,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150724599] [2020-10-13 05:20:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:07,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:08,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:20:08,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:20:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-13 05:20:08,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:08,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:20:08,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:08,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:08,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:08,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:08,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:08,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:20:08,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:08,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:08,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150724599] [2020-10-13 05:20:08,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:08,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:20:08,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735605707] [2020-10-13 05:20:08,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:20:08,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:20:08,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:20:08,065 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-10-13 05:20:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:08,194 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-10-13 05:20:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:20:08,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 05:20:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:08,196 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:20:08,196 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:20:08,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:20:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:20:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-13 05:20:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:20:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-13 05:20:08,206 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2020-10-13 05:20:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:08,207 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-13 05:20:08,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:20:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-13 05:20:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:20:08,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:08,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:08,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:20:08,209 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:08,209 INFO L82 PathProgramCache]: Analyzing trace with hash -204061721, now seen corresponding path program 1 times [2020-10-13 05:20:08,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:08,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179188289] [2020-10-13 05:20:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:08,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:11,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:20:11,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:11,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2854 [2020-10-13 05:20:11,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:11,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:20:11,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:11,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:20:11,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:11,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:11,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:11,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:11,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:11,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:11,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:20:11,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179188289] [2020-10-13 05:20:11,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:11,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:20:11,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454985825] [2020-10-13 05:20:11,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:20:11,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:20:11,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:11,125 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-13 05:20:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:11,249 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-10-13 05:20:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:20:11,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-13 05:20:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:11,251 INFO L225 Difference]: With dead ends: 64 [2020-10-13 05:20:11,251 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 05:20:11,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:11,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 05:20:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-10-13 05:20:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 05:20:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-13 05:20:11,260 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2020-10-13 05:20:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:11,261 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-13 05:20:11,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:20:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-13 05:20:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:20:11,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:11,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:11,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:20:11,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2129089696, now seen corresponding path program 2 times [2020-10-13 05:20:11,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:11,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331610616] [2020-10-13 05:20:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:11,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:16,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 05:20:16,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 05:20:16,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:20:16,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:16,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:20:16,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 05:20:16,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:20:16,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:16,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:16,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:16,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:16,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:16,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:16,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:16,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:20:16,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331610616] [2020-10-13 05:20:16,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:16,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:20:16,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849793540] [2020-10-13 05:20:16,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:20:16,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:16,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:20:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:16,348 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 5 states. [2020-10-13 05:20:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:16,514 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2020-10-13 05:20:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:20:16,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-13 05:20:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:16,520 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:20:16,521 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 05:20:16,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 05:20:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-13 05:20:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 05:20:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-13 05:20:16,550 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 33 [2020-10-13 05:20:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:16,550 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-13 05:20:16,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:20:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-13 05:20:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:20:16,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:16,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:16,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:20:16,555 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:16,555 INFO L82 PathProgramCache]: Analyzing trace with hash -577529698, now seen corresponding path program 1 times [2020-10-13 05:20:16,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:16,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361982423] [2020-10-13 05:20:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:16,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:17,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:18,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:21,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 05:20:21,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:20:21,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:20:21,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:21,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:20:21,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:21,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:20:21,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:21,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:21,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:21,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:21,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:21,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:20:21,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:21,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:21,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:21,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:21,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 05:20:21,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361982423] [2020-10-13 05:20:21,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:21,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:20:21,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398242175] [2020-10-13 05:20:21,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:20:21,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:21,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:20:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:21,629 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 6 states. [2020-10-13 05:20:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:21,791 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2020-10-13 05:20:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:20:21,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-13 05:20:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:21,794 INFO L225 Difference]: With dead ends: 108 [2020-10-13 05:20:21,794 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 05:20:21,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 05:20:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2020-10-13 05:20:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 05:20:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-10-13 05:20:21,817 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 33 [2020-10-13 05:20:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:21,817 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-10-13 05:20:21,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:20:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-10-13 05:20:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:20:21,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:21,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:21,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:20:21,821 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1131233919, now seen corresponding path program 2 times [2020-10-13 05:20:21,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:21,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456672827] [2020-10-13 05:20:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:21,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:23,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:23,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:26,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:26,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:20:26,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 05:20:26,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:20:26,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:20:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:20:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:20:26,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:26,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:26,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:26,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:26,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:26,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:26,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:26,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:26,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:26,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:26,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:26,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 05:20:26,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456672827] [2020-10-13 05:20:26,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:26,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:20:26,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911620183] [2020-10-13 05:20:26,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:20:26,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:20:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:26,909 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 6 states. [2020-10-13 05:20:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:27,053 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-10-13 05:20:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:20:27,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-13 05:20:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:27,055 INFO L225 Difference]: With dead ends: 114 [2020-10-13 05:20:27,055 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 05:20:27,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 05:20:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-13 05:20:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 05:20:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-10-13 05:20:27,065 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 41 [2020-10-13 05:20:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:27,066 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-10-13 05:20:27,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:20:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-10-13 05:20:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:20:27,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:27,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:27,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:20:27,068 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash -313585469, now seen corresponding path program 3 times [2020-10-13 05:20:27,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:27,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730978700] [2020-10-13 05:20:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:27,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:32,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:20:32,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:20:32,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:20:32,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:32,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:20:32,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:20:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:32,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:32,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:32,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:32,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:32,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:32,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:32,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 05:20:32,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730978700] [2020-10-13 05:20:32,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:32,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:20:32,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374741351] [2020-10-13 05:20:32,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:20:32,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:20:32,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:20:32,136 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 7 states. [2020-10-13 05:20:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:32,266 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2020-10-13 05:20:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:20:32,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-13 05:20:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:32,268 INFO L225 Difference]: With dead ends: 134 [2020-10-13 05:20:32,268 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 05:20:32,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:20:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 05:20:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-10-13 05:20:32,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:20:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-10-13 05:20:32,278 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 41 [2020-10-13 05:20:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:32,278 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-10-13 05:20:32,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:20:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-10-13 05:20:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:20:32,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:32,280 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:32,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:20:32,280 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:32,281 INFO L82 PathProgramCache]: Analyzing trace with hash -131093062, now seen corresponding path program 4 times [2020-10-13 05:20:32,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:32,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993687912] [2020-10-13 05:20:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:32,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:37,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:20:37,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:20:37,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:20:37,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:20:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:20:37,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:37,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:37,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:37,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:37,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:37,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:37,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 05:20:37,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993687912] [2020-10-13 05:20:37,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:37,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:20:37,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995490478] [2020-10-13 05:20:37,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:20:37,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:37,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:20:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:20:37,363 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 8 states. [2020-10-13 05:20:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:37,661 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2020-10-13 05:20:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:20:37,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-13 05:20:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:37,663 INFO L225 Difference]: With dead ends: 160 [2020-10-13 05:20:37,663 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 05:20:37,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:20:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 05:20:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2020-10-13 05:20:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 05:20:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2020-10-13 05:20:37,674 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 49 [2020-10-13 05:20:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:37,675 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2020-10-13 05:20:37,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:20:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2020-10-13 05:20:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:20:37,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:37,676 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:37,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:20:37,677 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash -942472289, now seen corresponding path program 5 times [2020-10-13 05:20:37,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:37,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737997462] [2020-10-13 05:20:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:37,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:38,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:20:42,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:20:42,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:20:42,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:20:42,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:42,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:20:42,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:42,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:42,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:42,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:42,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:42,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:42,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:42,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:42,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 05:20:42,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737997462] [2020-10-13 05:20:42,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:42,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:20:42,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706237319] [2020-10-13 05:20:42,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:20:42,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:42,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:20:42,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:20:42,772 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand 9 states. [2020-10-13 05:20:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:42,975 INFO L93 Difference]: Finished difference Result 186 states and 224 transitions. [2020-10-13 05:20:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:20:42,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-13 05:20:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:42,976 INFO L225 Difference]: With dead ends: 186 [2020-10-13 05:20:42,976 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 05:20:42,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:20:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 05:20:42,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2020-10-13 05:20:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 05:20:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2020-10-13 05:20:42,987 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 57 [2020-10-13 05:20:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:42,987 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2020-10-13 05:20:42,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:20:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2020-10-13 05:20:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:20:42,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:42,989 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:42,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:20:42,989 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:42,989 INFO L82 PathProgramCache]: Analyzing trace with hash -549291818, now seen corresponding path program 6 times [2020-10-13 05:20:42,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:42,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894910066] [2020-10-13 05:20:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:48,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:48,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:20:48,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:20:48,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:20:48,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:48,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:20:48,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:20:48,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:48,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:48,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:48,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:48,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:48,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:48,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:48,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:48,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:48,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:48,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:48,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 05:20:48,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894910066] [2020-10-13 05:20:48,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:48,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:20:48,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658397175] [2020-10-13 05:20:48,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:20:48,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:20:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:20:48,107 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand 10 states. [2020-10-13 05:20:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:48,301 INFO L93 Difference]: Finished difference Result 212 states and 254 transitions. [2020-10-13 05:20:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:20:48,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-13 05:20:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:48,303 INFO L225 Difference]: With dead ends: 212 [2020-10-13 05:20:48,303 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 05:20:48,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:20:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 05:20:48,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2020-10-13 05:20:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 05:20:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2020-10-13 05:20:48,313 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 65 [2020-10-13 05:20:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:48,313 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2020-10-13 05:20:48,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:20:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2020-10-13 05:20:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 05:20:48,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:48,315 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:48,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:20:48,315 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:48,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1094509445, now seen corresponding path program 7 times [2020-10-13 05:20:48,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:48,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143932675] [2020-10-13 05:20:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:48,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:48,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:48,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:48,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:49,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:49,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:53,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:53,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 05:20:53,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:20:53,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:20:53,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:53,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:20:53,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:53,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:20:53,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:53,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:53,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:53,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:53,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:53,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:53,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:53,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:53,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:53,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-13 05:20:53,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143932675] [2020-10-13 05:20:53,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:53,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:20:53,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003966293] [2020-10-13 05:20:53,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:20:53,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:53,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:20:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:20:53,426 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 11 states. [2020-10-13 05:20:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:53,665 INFO L93 Difference]: Finished difference Result 238 states and 284 transitions. [2020-10-13 05:20:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:20:53,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-10-13 05:20:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:53,666 INFO L225 Difference]: With dead ends: 238 [2020-10-13 05:20:53,666 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 05:20:53,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:20:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 05:20:53,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2020-10-13 05:20:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 05:20:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2020-10-13 05:20:53,677 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 73 [2020-10-13 05:20:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:53,677 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2020-10-13 05:20:53,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:20:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2020-10-13 05:20:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:20:53,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:53,679 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:53,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:20:53,679 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:53,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:53,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1193343474, now seen corresponding path program 8 times [2020-10-13 05:20:53,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:53,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035819492] [2020-10-13 05:20:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:53,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:53,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:53,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:54,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:56,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:58,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:58,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:20:58,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:58,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:20:58,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:58,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:20:58,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:58,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:20:58,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:58,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:58,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:58,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:58,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:58,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:58,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:58,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:58,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:58,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-10-13 05:20:58,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035819492] [2020-10-13 05:20:58,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:58,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:20:58,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21340494] [2020-10-13 05:20:58,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:20:58,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:58,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:20:58,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:20:58,812 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand 12 states. [2020-10-13 05:20:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:59,061 INFO L93 Difference]: Finished difference Result 264 states and 314 transitions. [2020-10-13 05:20:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:20:59,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-13 05:20:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:59,063 INFO L225 Difference]: With dead ends: 264 [2020-10-13 05:20:59,063 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 05:20:59,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:20:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 05:20:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2020-10-13 05:20:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 05:20:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 169 transitions. [2020-10-13 05:20:59,073 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 169 transitions. Word has length 81 [2020-10-13 05:20:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:59,074 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 169 transitions. [2020-10-13 05:20:59,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:20:59,074 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 169 transitions. [2020-10-13 05:20:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 05:20:59,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:59,075 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:59,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:20:59,075 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1065329833, now seen corresponding path program 9 times [2020-10-13 05:20:59,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:59,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069782842] [2020-10-13 05:20:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:59,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:59,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:59,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:59,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:00,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:04,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 05:21:04,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:04,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:21:04,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:21:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:21:04,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:04,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:04,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:04,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:04,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:04,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:21:04,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:04,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:04,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:04,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:04,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-13 05:21:04,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069782842] [2020-10-13 05:21:04,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:04,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:21:04,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232806830] [2020-10-13 05:21:04,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:21:04,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:04,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:21:04,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:21:04,233 INFO L87 Difference]: Start difference. First operand 146 states and 169 transitions. Second operand 13 states. [2020-10-13 05:21:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:04,551 INFO L93 Difference]: Finished difference Result 290 states and 344 transitions. [2020-10-13 05:21:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:21:04,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-10-13 05:21:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:04,554 INFO L225 Difference]: With dead ends: 290 [2020-10-13 05:21:04,554 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 05:21:04,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:21:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 05:21:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 160. [2020-10-13 05:21:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 05:21:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2020-10-13 05:21:04,579 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 89 [2020-10-13 05:21:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:04,582 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2020-10-13 05:21:04,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:21:04,583 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2020-10-13 05:21:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 05:21:04,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:04,585 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:04,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:21:04,586 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1075851534, now seen corresponding path program 10 times [2020-10-13 05:21:04,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:04,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516827004] [2020-10-13 05:21:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:04,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:06,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:09,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:09,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 05:21:09,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:09,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-13 05:21:09,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:09,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:21:09,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:09,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:21:09,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:09,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:09,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:09,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:09,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:09,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:09,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:09,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:09,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-13 05:21:09,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516827004] [2020-10-13 05:21:09,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:09,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:21:09,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13645598] [2020-10-13 05:21:09,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:21:09,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:09,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:21:09,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:21:09,912 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand 14 states. [2020-10-13 05:21:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:10,214 INFO L93 Difference]: Finished difference Result 316 states and 374 transitions. [2020-10-13 05:21:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:21:10,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-13 05:21:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:10,216 INFO L225 Difference]: With dead ends: 316 [2020-10-13 05:21:10,218 INFO L226 Difference]: Without dead ends: 183 [2020-10-13 05:21:10,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:21:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-13 05:21:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 174. [2020-10-13 05:21:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 05:21:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 201 transitions. [2020-10-13 05:21:10,229 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 201 transitions. Word has length 97 [2020-10-13 05:21:10,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:10,230 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 201 transitions. [2020-10-13 05:21:10,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:21:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 201 transitions. [2020-10-13 05:21:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 05:21:10,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:10,232 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:10,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:21:10,232 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:10,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1905541069, now seen corresponding path program 11 times [2020-10-13 05:21:10,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:10,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714205250] [2020-10-13 05:21:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:10,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:10,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:10,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:10,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:13,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:15,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 05:21:15,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:15,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 05:21:15,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:21:15,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:15,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:21:15,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:15,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:15,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:15,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:15,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:15,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:15,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:15,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:15,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:15,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:15,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-10-13 05:21:15,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714205250] [2020-10-13 05:21:15,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:15,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:21:15,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797647272] [2020-10-13 05:21:15,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:21:15,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:15,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:21:15,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:21:15,433 INFO L87 Difference]: Start difference. First operand 174 states and 201 transitions. Second operand 15 states. [2020-10-13 05:21:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:15,740 INFO L93 Difference]: Finished difference Result 342 states and 404 transitions. [2020-10-13 05:21:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:21:15,740 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 105 [2020-10-13 05:21:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:15,743 INFO L225 Difference]: With dead ends: 342 [2020-10-13 05:21:15,743 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 05:21:15,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:21:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 05:21:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 188. [2020-10-13 05:21:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-13 05:21:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2020-10-13 05:21:15,752 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 105 [2020-10-13 05:21:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:15,753 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2020-10-13 05:21:15,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:21:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2020-10-13 05:21:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 05:21:15,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:15,754 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:15,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:21:15,755 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:15,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:15,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1768612310, now seen corresponding path program 12 times [2020-10-13 05:21:15,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:15,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741512346] [2020-10-13 05:21:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:15,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:18,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:20,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:20,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 05:21:20,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:20,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:21:20,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:21:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:21:20,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:20,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:20,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:20,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:20,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:20,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:20,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:20,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:20,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:20,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:20,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:20,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 05:21:20,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741512346] [2020-10-13 05:21:20,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:20,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:21:20,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865513523] [2020-10-13 05:21:20,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:21:20,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:20,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:21:20,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:21:20,956 INFO L87 Difference]: Start difference. First operand 188 states and 217 transitions. Second operand 16 states. [2020-10-13 05:21:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:21,299 INFO L93 Difference]: Finished difference Result 368 states and 434 transitions. [2020-10-13 05:21:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:21:21,300 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 113 [2020-10-13 05:21:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:21,302 INFO L225 Difference]: With dead ends: 368 [2020-10-13 05:21:21,302 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 05:21:21,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:21:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 05:21:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2020-10-13 05:21:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 05:21:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 233 transitions. [2020-10-13 05:21:21,313 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 233 transitions. Word has length 113 [2020-10-13 05:21:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:21,314 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 233 transitions. [2020-10-13 05:21:21,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:21:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 233 transitions. [2020-10-13 05:21:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 05:21:21,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:21,315 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:21,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:21:21,316 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:21,316 INFO L82 PathProgramCache]: Analyzing trace with hash -588887281, now seen corresponding path program 13 times [2020-10-13 05:21:21,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:21,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828244974] [2020-10-13 05:21:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:21,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:22,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:26,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:26,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 05:21:26,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:26,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-13 05:21:26,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:21:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:21:26,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:26,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:26,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:26,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:26,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:26,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:26,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:26,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:26,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:26,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:26,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:26,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2020-10-13 05:21:26,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828244974] [2020-10-13 05:21:26,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:26,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:21:26,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59210628] [2020-10-13 05:21:26,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:21:26,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:26,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:21:26,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:21:26,574 INFO L87 Difference]: Start difference. First operand 202 states and 233 transitions. Second operand 17 states. [2020-10-13 05:21:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:26,951 INFO L93 Difference]: Finished difference Result 394 states and 464 transitions. [2020-10-13 05:21:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:21:26,952 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-10-13 05:21:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:26,954 INFO L225 Difference]: With dead ends: 394 [2020-10-13 05:21:26,954 INFO L226 Difference]: Without dead ends: 225 [2020-10-13 05:21:26,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:21:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-13 05:21:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 216. [2020-10-13 05:21:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 05:21:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 249 transitions. [2020-10-13 05:21:26,965 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 249 transitions. Word has length 121 [2020-10-13 05:21:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:26,965 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 249 transitions. [2020-10-13 05:21:26,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:21:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 249 transitions. [2020-10-13 05:21:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 05:21:26,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:26,967 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:26,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:21:26,967 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash 852803910, now seen corresponding path program 14 times [2020-10-13 05:21:26,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:26,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654497480] [2020-10-13 05:21:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:26,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:27,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:27,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:28,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:31,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:32,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 05:21:32,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:32,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 05:21:32,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:32,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:21:32,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:32,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:21:32,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:32,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:32,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:32,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:32,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:32,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:32,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:32,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:32,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:32,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:32,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-10-13 05:21:32,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654497480] [2020-10-13 05:21:32,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:32,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:21:32,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114006563] [2020-10-13 05:21:32,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:21:32,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:32,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:21:32,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:21:32,209 INFO L87 Difference]: Start difference. First operand 216 states and 249 transitions. Second operand 18 states. [2020-10-13 05:21:32,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:32,598 INFO L93 Difference]: Finished difference Result 420 states and 494 transitions. [2020-10-13 05:21:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:21:32,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 129 [2020-10-13 05:21:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:32,601 INFO L225 Difference]: With dead ends: 420 [2020-10-13 05:21:32,601 INFO L226 Difference]: Without dead ends: 239 [2020-10-13 05:21:32,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:21:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-13 05:21:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 230. [2020-10-13 05:21:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 05:21:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 265 transitions. [2020-10-13 05:21:32,614 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 265 transitions. Word has length 129 [2020-10-13 05:21:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:32,614 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 265 transitions. [2020-10-13 05:21:32,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:21:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 265 transitions. [2020-10-13 05:21:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 05:21:32,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:32,616 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:32,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:21:32,616 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:32,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:32,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1934687211, now seen corresponding path program 15 times [2020-10-13 05:21:32,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:32,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444779492] [2020-10-13 05:21:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:37,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:37,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 05:21:37,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:37,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5222 [2020-10-13 05:21:37,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:37,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:21:37,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:37,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:21:37,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:38,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:38,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:38,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:38,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:38,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:38,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:38,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:38,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:38,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:38,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:38,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-13 05:21:38,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444779492] [2020-10-13 05:21:38,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:38,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:21:38,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576211269] [2020-10-13 05:21:38,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:21:38,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:38,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:21:38,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:21:38,071 INFO L87 Difference]: Start difference. First operand 230 states and 265 transitions. Second operand 19 states. [2020-10-13 05:21:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:38,461 INFO L93 Difference]: Finished difference Result 446 states and 524 transitions. [2020-10-13 05:21:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:21:38,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 137 [2020-10-13 05:21:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:38,464 INFO L225 Difference]: With dead ends: 446 [2020-10-13 05:21:38,464 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 05:21:38,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:21:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 05:21:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 244. [2020-10-13 05:21:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 05:21:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 281 transitions. [2020-10-13 05:21:38,475 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 281 transitions. Word has length 137 [2020-10-13 05:21:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:38,475 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 281 transitions. [2020-10-13 05:21:38,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:21:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 281 transitions. [2020-10-13 05:21:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 05:21:38,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:38,477 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:38,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:21:38,477 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:38,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2033457762, now seen corresponding path program 16 times [2020-10-13 05:21:38,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:38,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505755191] [2020-10-13 05:21:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:38,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:38,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:40,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:40,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:43,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:43,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 05:21:43,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:21:43,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5139 [2020-10-13 05:21:43,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:43,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:21:43,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:43,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:21:43,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:43,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:43,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:43,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:43,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:43,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:43,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:43,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:43,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:43,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:43,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-10-13 05:21:43,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505755191] [2020-10-13 05:21:43,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:43,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:21:43,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833802692] [2020-10-13 05:21:43,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:21:43,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:21:43,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:21:43,863 INFO L87 Difference]: Start difference. First operand 244 states and 281 transitions. Second operand 20 states. [2020-10-13 05:21:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:44,304 INFO L93 Difference]: Finished difference Result 472 states and 554 transitions. [2020-10-13 05:21:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:21:44,304 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 145 [2020-10-13 05:21:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:44,306 INFO L225 Difference]: With dead ends: 472 [2020-10-13 05:21:44,307 INFO L226 Difference]: Without dead ends: 267 [2020-10-13 05:21:44,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:21:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-13 05:21:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 258. [2020-10-13 05:21:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 05:21:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 297 transitions. [2020-10-13 05:21:44,318 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 297 transitions. Word has length 145 [2020-10-13 05:21:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:44,318 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 297 transitions. [2020-10-13 05:21:44,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:21:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 297 transitions. [2020-10-13 05:21:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 05:21:44,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:44,320 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:44,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:21:44,321 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:44,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:44,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1275908807, now seen corresponding path program 17 times [2020-10-13 05:21:44,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:44,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216762047] [2020-10-13 05:21:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:44,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:44,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:44,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:44,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:49,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:49,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 05:21:49,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:49,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-13 05:21:49,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:49,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:21:49,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:49,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:21:49,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:49,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:49,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:49,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:49,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:49,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:49,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:49,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:49,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:49,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:49,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:49,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-10-13 05:21:49,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216762047] [2020-10-13 05:21:49,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:49,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:21:49,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176011190] [2020-10-13 05:21:49,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:21:49,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:49,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:21:49,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:21:49,710 INFO L87 Difference]: Start difference. First operand 258 states and 297 transitions. Second operand 21 states. [2020-10-13 05:21:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:50,137 INFO L93 Difference]: Finished difference Result 498 states and 584 transitions. [2020-10-13 05:21:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:21:50,138 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 153 [2020-10-13 05:21:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:50,140 INFO L225 Difference]: With dead ends: 498 [2020-10-13 05:21:50,140 INFO L226 Difference]: Without dead ends: 281 [2020-10-13 05:21:50,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:21:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-13 05:21:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 272. [2020-10-13 05:21:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-13 05:21:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 313 transitions. [2020-10-13 05:21:50,152 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 313 transitions. Word has length 153 [2020-10-13 05:21:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:50,152 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 313 transitions. [2020-10-13 05:21:50,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:21:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 313 transitions. [2020-10-13 05:21:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 05:21:50,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:50,155 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:50,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:21:50,155 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1442305666, now seen corresponding path program 18 times [2020-10-13 05:21:50,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:50,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136784619] [2020-10-13 05:21:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:50,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:50,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:50,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:53,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:55,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 05:21:55,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:55,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-13 05:21:55,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:21:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:21:55,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:55,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:55,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:55,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:55,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:55,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:55,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:55,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:55,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:55,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:55,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2020-10-13 05:21:55,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136784619] [2020-10-13 05:21:55,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:55,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:21:55,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138257543] [2020-10-13 05:21:55,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:21:55,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:55,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:21:55,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:21:55,594 INFO L87 Difference]: Start difference. First operand 272 states and 313 transitions. Second operand 22 states. [2020-10-13 05:21:56,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:56,081 INFO L93 Difference]: Finished difference Result 524 states and 614 transitions. [2020-10-13 05:21:56,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:21:56,083 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 161 [2020-10-13 05:21:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:56,085 INFO L225 Difference]: With dead ends: 524 [2020-10-13 05:21:56,085 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 05:21:56,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:21:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 05:21:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 286. [2020-10-13 05:21:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 05:21:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 329 transitions. [2020-10-13 05:21:56,097 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 329 transitions. Word has length 161 [2020-10-13 05:21:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:56,098 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 329 transitions. [2020-10-13 05:21:56,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:21:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 329 transitions. [2020-10-13 05:21:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 05:21:56,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:56,100 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:56,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:21:56,101 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:56,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1267019869, now seen corresponding path program 19 times [2020-10-13 05:21:56,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:56,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019772552] [2020-10-13 05:21:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:56,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:56,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:59,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:59,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:01,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:01,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 05:22:01,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:22:01,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-13 05:22:01,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:01,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:22:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:22:01,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:01,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:01,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:01,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:01,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:01,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:01,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:01,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:01,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:01,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:01,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:01,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2020-10-13 05:22:01,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019772552] [2020-10-13 05:22:01,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:01,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:22:01,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686450383] [2020-10-13 05:22:01,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:22:01,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:01,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:22:01,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:22:01,545 INFO L87 Difference]: Start difference. First operand 286 states and 329 transitions. Second operand 23 states. [2020-10-13 05:22:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:02,037 INFO L93 Difference]: Finished difference Result 550 states and 644 transitions. [2020-10-13 05:22:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:22:02,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 169 [2020-10-13 05:22:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:02,040 INFO L225 Difference]: With dead ends: 550 [2020-10-13 05:22:02,040 INFO L226 Difference]: Without dead ends: 309 [2020-10-13 05:22:02,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:22:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-13 05:22:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 300. [2020-10-13 05:22:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-13 05:22:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 345 transitions. [2020-10-13 05:22:02,053 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 345 transitions. Word has length 169 [2020-10-13 05:22:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:02,054 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 345 transitions. [2020-10-13 05:22:02,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:22:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 345 transitions. [2020-10-13 05:22:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 05:22:02,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:02,056 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:02,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:22:02,056 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1101393562, now seen corresponding path program 20 times [2020-10-13 05:22:02,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:02,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822461208] [2020-10-13 05:22:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:02,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:02,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:02,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:02,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:07,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:07,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 05:22:07,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:22:07,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:22:07,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:07,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:22:07,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:07,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:22:07,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:07,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:07,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:07,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:07,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:07,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:07,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:07,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:07,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:07,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:07,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:07,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2020-10-13 05:22:07,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822461208] [2020-10-13 05:22:07,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:07,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:22:07,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147321719] [2020-10-13 05:22:07,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:22:07,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:07,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:22:07,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:22:07,400 INFO L87 Difference]: Start difference. First operand 300 states and 345 transitions. Second operand 24 states. [2020-10-13 05:22:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:07,909 INFO L93 Difference]: Finished difference Result 576 states and 674 transitions. [2020-10-13 05:22:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:22:07,910 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 177 [2020-10-13 05:22:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:07,913 INFO L225 Difference]: With dead ends: 576 [2020-10-13 05:22:07,913 INFO L226 Difference]: Without dead ends: 323 [2020-10-13 05:22:07,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:22:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-13 05:22:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 314. [2020-10-13 05:22:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-13 05:22:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 361 transitions. [2020-10-13 05:22:07,925 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 361 transitions. Word has length 177 [2020-10-13 05:22:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:07,925 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 361 transitions. [2020-10-13 05:22:07,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:22:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 361 transitions. [2020-10-13 05:22:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-13 05:22:07,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:07,927 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:07,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:22:07,927 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1828450943, now seen corresponding path program 21 times [2020-10-13 05:22:07,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:07,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714997549] [2020-10-13 05:22:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:07,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:08,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:08,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:13,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:13,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 05:22:13,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:13,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-13 05:22:13,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:13,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:22:13,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:13,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:22:13,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:13,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:13,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:13,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:13,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:13,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:13,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:13,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:13,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:13,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:13,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:13,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2020-10-13 05:22:13,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714997549] [2020-10-13 05:22:13,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:13,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:22:13,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015795776] [2020-10-13 05:22:13,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:22:13,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:13,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:22:13,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:22:13,431 INFO L87 Difference]: Start difference. First operand 314 states and 361 transitions. Second operand 25 states. [2020-10-13 05:22:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:13,908 INFO L93 Difference]: Finished difference Result 602 states and 704 transitions. [2020-10-13 05:22:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:22:13,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 185 [2020-10-13 05:22:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:13,911 INFO L225 Difference]: With dead ends: 602 [2020-10-13 05:22:13,911 INFO L226 Difference]: Without dead ends: 337 [2020-10-13 05:22:13,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:22:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-13 05:22:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 328. [2020-10-13 05:22:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-13 05:22:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 377 transitions. [2020-10-13 05:22:13,923 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 377 transitions. Word has length 185 [2020-10-13 05:22:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:13,924 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 377 transitions. [2020-10-13 05:22:13,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:22:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 377 transitions. [2020-10-13 05:22:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-13 05:22:13,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:13,926 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:13,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:22:13,926 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:13,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1482844598, now seen corresponding path program 22 times [2020-10-13 05:22:13,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:13,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445231820] [2020-10-13 05:22:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:13,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:14,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:14,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:18,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:18,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-13 05:22:18,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:18,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 05:22:18,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:22:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:22:18,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:19,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:19,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:19,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:19,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:19,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:19,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:19,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:19,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-13 05:22:19,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445231820] [2020-10-13 05:22:19,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:19,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:22:19,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227742773] [2020-10-13 05:22:19,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:22:19,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:22:19,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:22:19,365 INFO L87 Difference]: Start difference. First operand 328 states and 377 transitions. Second operand 26 states. [2020-10-13 05:22:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:19,914 INFO L93 Difference]: Finished difference Result 628 states and 734 transitions. [2020-10-13 05:22:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:22:19,914 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 193 [2020-10-13 05:22:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:19,917 INFO L225 Difference]: With dead ends: 628 [2020-10-13 05:22:19,917 INFO L226 Difference]: Without dead ends: 351 [2020-10-13 05:22:19,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:22:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-13 05:22:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 342. [2020-10-13 05:22:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-13 05:22:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 393 transitions. [2020-10-13 05:22:19,930 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 393 transitions. Word has length 193 [2020-10-13 05:22:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:19,931 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 393 transitions. [2020-10-13 05:22:19,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:22:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 393 transitions. [2020-10-13 05:22:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 05:22:19,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:19,933 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:19,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:22:19,933 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash -923714725, now seen corresponding path program 23 times [2020-10-13 05:22:19,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:19,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424581394] [2020-10-13 05:22:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:19,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:20,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:20,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:24,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:24,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 05:22:24,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:24,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 05:22:24,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:22:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 05:22:24,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:25,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:25,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:25,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:25,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:25,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:25,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:25,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:25,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:25,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:25,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:25,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:22:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1564 trivial. 0 not checked. [2020-10-13 05:22:25,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424581394] [2020-10-13 05:22:25,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:25,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:22:25,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52406806] [2020-10-13 05:22:25,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:22:25,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:25,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:22:25,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:22:25,528 INFO L87 Difference]: Start difference. First operand 342 states and 393 transitions. Second operand 27 states. [2020-10-13 05:22:26,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:26,152 INFO L93 Difference]: Finished difference Result 654 states and 764 transitions. [2020-10-13 05:22:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:22:26,153 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 201 [2020-10-13 05:22:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:26,155 INFO L225 Difference]: With dead ends: 654 [2020-10-13 05:22:26,156 INFO L226 Difference]: Without dead ends: 365 [2020-10-13 05:22:26,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:22:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-13 05:22:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 356. [2020-10-13 05:22:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-13 05:22:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 409 transitions. [2020-10-13 05:22:26,169 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 409 transitions. Word has length 201 [2020-10-13 05:22:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:26,169 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 409 transitions. [2020-10-13 05:22:26,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:22:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 409 transitions. [2020-10-13 05:22:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 05:22:26,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:26,171 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:26,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:22:26,172 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:26,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:26,172 INFO L82 PathProgramCache]: Analyzing trace with hash 43162322, now seen corresponding path program 24 times [2020-10-13 05:22:26,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:26,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104578121] [2020-10-13 05:22:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:26,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:26,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:26,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:31,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:31,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 05:22:31,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:31,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 05:22:31,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:31,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:22:31,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:31,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 05:22:31,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:31,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:31,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:31,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:31,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:31,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:31,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:31,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:31,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:31,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:22:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1704 trivial. 0 not checked. [2020-10-13 05:22:31,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104578121] [2020-10-13 05:22:31,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:31,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:22:31,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666906415] [2020-10-13 05:22:31,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:22:31,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:31,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:22:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:22:31,815 INFO L87 Difference]: Start difference. First operand 356 states and 409 transitions. Second operand 28 states. [2020-10-13 05:22:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:32,413 INFO L93 Difference]: Finished difference Result 680 states and 794 transitions. [2020-10-13 05:22:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:22:32,413 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 209 [2020-10-13 05:22:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:32,415 INFO L225 Difference]: With dead ends: 680 [2020-10-13 05:22:32,415 INFO L226 Difference]: Without dead ends: 379 [2020-10-13 05:22:32,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:22:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-13 05:22:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 370. [2020-10-13 05:22:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-13 05:22:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 425 transitions. [2020-10-13 05:22:32,429 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 425 transitions. Word has length 209 [2020-10-13 05:22:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:32,429 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 425 transitions. [2020-10-13 05:22:32,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:22:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 425 transitions. [2020-10-13 05:22:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 05:22:32,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:32,431 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:32,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:22:32,432 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash -826561993, now seen corresponding path program 25 times [2020-10-13 05:22:32,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:32,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119528904] [2020-10-13 05:22:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:32,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:32,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:32,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:37,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:37,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-13 05:22:37,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5281 [2020-10-13 05:22:37,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:22:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:22:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:38,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:38,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:38,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:38,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:38,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:38,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:38,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:38,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2020-10-13 05:22:38,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119528904] [2020-10-13 05:22:38,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:38,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:22:38,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854048947] [2020-10-13 05:22:38,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:22:38,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:38,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:22:38,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:22:38,240 INFO L87 Difference]: Start difference. First operand 370 states and 425 transitions. Second operand 29 states. [2020-10-13 05:22:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:38,865 INFO L93 Difference]: Finished difference Result 706 states and 824 transitions. [2020-10-13 05:22:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:22:38,866 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 217 [2020-10-13 05:22:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:38,869 INFO L225 Difference]: With dead ends: 706 [2020-10-13 05:22:38,869 INFO L226 Difference]: Without dead ends: 393 [2020-10-13 05:22:38,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:22:38,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-13 05:22:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 384. [2020-10-13 05:22:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-13 05:22:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 441 transitions. [2020-10-13 05:22:38,882 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 441 transitions. Word has length 217 [2020-10-13 05:22:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:38,882 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 441 transitions. [2020-10-13 05:22:38,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:22:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 441 transitions. [2020-10-13 05:22:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-13 05:22:38,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:38,884 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:38,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:22:38,885 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1333034514, now seen corresponding path program 26 times [2020-10-13 05:22:38,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:38,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158467831] [2020-10-13 05:22:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:38,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:39,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:39,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:45,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:45,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 05:22:45,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:45,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6291 [2020-10-13 05:22:45,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:22:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 05:22:45,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:45,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:45,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:45,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:45,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:45,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:45,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:45,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:45,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:45,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 2627 trivial. 0 not checked. [2020-10-13 05:22:45,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158467831] [2020-10-13 05:22:45,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:22:45,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:22:45,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160921669] [2020-10-13 05:22:45,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:22:45,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:45,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:22:45,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:22:45,342 INFO L87 Difference]: Start difference. First operand 384 states and 441 transitions. Second operand 5 states. [2020-10-13 05:22:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:45,448 INFO L93 Difference]: Finished difference Result 623 states and 709 transitions. [2020-10-13 05:22:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:22:45,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-10-13 05:22:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:45,450 INFO L225 Difference]: With dead ends: 623 [2020-10-13 05:22:45,450 INFO L226 Difference]: Without dead ends: 378 [2020-10-13 05:22:45,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:22:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-13 05:22:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2020-10-13 05:22:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-13 05:22:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 433 transitions. [2020-10-13 05:22:45,467 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 433 transitions. Word has length 225 [2020-10-13 05:22:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:45,467 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 433 transitions. [2020-10-13 05:22:45,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:22:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 433 transitions. [2020-10-13 05:22:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-13 05:22:45,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:45,471 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:45,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:22:45,471 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:45,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1795442994, now seen corresponding path program 27 times [2020-10-13 05:22:45,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:45,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811392536] [2020-10-13 05:22:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:45,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:45,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:45,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:50,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:50,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 05:22:50,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:50,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5252 [2020-10-13 05:22:50,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:50,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:22:50,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:50,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:22:50,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:51,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:51,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:51,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:51,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:51,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:51,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:51,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:51,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2020-10-13 05:22:51,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811392536] [2020-10-13 05:22:51,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:51,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:22:51,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529894413] [2020-10-13 05:22:51,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:22:51,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:51,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:22:51,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:22:51,296 INFO L87 Difference]: Start difference. First operand 378 states and 433 transitions. Second operand 30 states. [2020-10-13 05:22:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:51,984 INFO L93 Difference]: Finished difference Result 720 states and 838 transitions. [2020-10-13 05:22:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:22:51,984 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 225 [2020-10-13 05:22:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:51,987 INFO L225 Difference]: With dead ends: 720 [2020-10-13 05:22:51,987 INFO L226 Difference]: Without dead ends: 401 [2020-10-13 05:22:51,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:22:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-13 05:22:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 392. [2020-10-13 05:22:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-13 05:22:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 449 transitions. [2020-10-13 05:22:52,001 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 449 transitions. Word has length 225 [2020-10-13 05:22:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:52,002 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 449 transitions. [2020-10-13 05:22:52,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:22:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 449 transitions. [2020-10-13 05:22:52,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-13 05:22:52,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:52,004 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:52,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:22:52,005 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:52,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1567327063, now seen corresponding path program 28 times [2020-10-13 05:22:52,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:52,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979966187] [2020-10-13 05:22:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:52,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:52,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:57,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:57,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-13 05:22:57,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:57,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5283 [2020-10-13 05:22:57,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:57,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:22:57,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:57,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 05:22:57,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:57,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:57,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:57,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:57,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:57,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:57,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:57,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:57,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2020-10-13 05:22:57,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979966187] [2020-10-13 05:22:57,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:57,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:22:57,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106753489] [2020-10-13 05:22:57,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:22:57,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:57,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:22:57,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:22:57,862 INFO L87 Difference]: Start difference. First operand 392 states and 449 transitions. Second operand 31 states. [2020-10-13 05:22:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:58,508 INFO L93 Difference]: Finished difference Result 746 states and 868 transitions. [2020-10-13 05:22:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:22:58,509 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 233 [2020-10-13 05:22:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:58,511 INFO L225 Difference]: With dead ends: 746 [2020-10-13 05:22:58,511 INFO L226 Difference]: Without dead ends: 415 [2020-10-13 05:22:58,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:22:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-13 05:22:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 406. [2020-10-13 05:22:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-13 05:22:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 465 transitions. [2020-10-13 05:22:58,525 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 465 transitions. Word has length 233 [2020-10-13 05:22:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:58,525 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 465 transitions. [2020-10-13 05:22:58,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:22:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 465 transitions. [2020-10-13 05:22:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-13 05:22:58,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:58,527 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:58,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:22:58,528 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:58,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1980358578, now seen corresponding path program 29 times [2020-10-13 05:22:58,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:58,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526919365] [2020-10-13 05:22:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:58,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:58,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:58,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:59,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:05,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:05,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-13 05:23:05,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:23:05,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6832 [2020-10-13 05:23:05,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:05,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:23:05,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:05,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 05:23:05,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:05,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:05,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:05,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:05,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:05,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:05,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:05,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:05,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:05,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:05,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:05,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2324 trivial. 0 not checked. [2020-10-13 05:23:05,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526919365] [2020-10-13 05:23:05,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:05,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:23:05,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011421369] [2020-10-13 05:23:05,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:23:05,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:05,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:23:05,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:23:05,964 INFO L87 Difference]: Start difference. First operand 406 states and 465 transitions. Second operand 32 states. [2020-10-13 05:23:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:06,593 INFO L93 Difference]: Finished difference Result 772 states and 898 transitions. [2020-10-13 05:23:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:23:06,594 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 241 [2020-10-13 05:23:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:06,597 INFO L225 Difference]: With dead ends: 772 [2020-10-13 05:23:06,597 INFO L226 Difference]: Without dead ends: 429 [2020-10-13 05:23:06,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:23:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-13 05:23:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 420. [2020-10-13 05:23:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-10-13 05:23:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 481 transitions. [2020-10-13 05:23:06,611 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 481 transitions. Word has length 241 [2020-10-13 05:23:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:06,611 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 481 transitions. [2020-10-13 05:23:06,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:23:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 481 transitions. [2020-10-13 05:23:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-13 05:23:06,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:06,614 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:06,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:23:06,614 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1342896179, now seen corresponding path program 30 times [2020-10-13 05:23:06,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:06,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668502156] [2020-10-13 05:23:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:06,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:06,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:12,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-13 05:23:12,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:23:12,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5453 [2020-10-13 05:23:12,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:12,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:23:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 05:23:12,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:12,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:12,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:12,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:12,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:12,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:12,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:12,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:12,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2494 trivial. 0 not checked. [2020-10-13 05:23:12,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668502156] [2020-10-13 05:23:12,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:12,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:23:12,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651356405] [2020-10-13 05:23:12,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:23:12,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:12,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:23:12,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:23:12,715 INFO L87 Difference]: Start difference. First operand 420 states and 481 transitions. Second operand 33 states. [2020-10-13 05:23:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:13,481 INFO L93 Difference]: Finished difference Result 798 states and 928 transitions. [2020-10-13 05:23:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:23:13,482 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 249 [2020-10-13 05:23:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:13,485 INFO L225 Difference]: With dead ends: 798 [2020-10-13 05:23:13,485 INFO L226 Difference]: Without dead ends: 443 [2020-10-13 05:23:13,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:23:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-13 05:23:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 434. [2020-10-13 05:23:13,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-10-13 05:23:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 497 transitions. [2020-10-13 05:23:13,498 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 497 transitions. Word has length 249 [2020-10-13 05:23:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:13,498 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 497 transitions. [2020-10-13 05:23:13,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:23:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 497 transitions. [2020-10-13 05:23:13,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-13 05:23:13,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:13,501 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:13,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:23:13,501 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1616096618, now seen corresponding path program 31 times [2020-10-13 05:23:13,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:13,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651372783] [2020-10-13 05:23:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:13,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:13,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:13,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:20,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:20,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-13 05:23:20,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:23:20,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6593 [2020-10-13 05:23:20,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:20,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:23:20,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:20,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:23:20,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:20,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:20,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:20,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:20,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:20,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:20,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:20,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:20,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:20,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:20,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:20,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2020-10-13 05:23:20,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651372783] [2020-10-13 05:23:20,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:20,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:23:20,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396718270] [2020-10-13 05:23:20,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:23:20,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:20,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:23:20,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:23:20,776 INFO L87 Difference]: Start difference. First operand 434 states and 497 transitions. Second operand 34 states. [2020-10-13 05:23:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:21,624 INFO L93 Difference]: Finished difference Result 824 states and 958 transitions. [2020-10-13 05:23:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:23:21,625 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 257 [2020-10-13 05:23:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:21,630 INFO L225 Difference]: With dead ends: 824 [2020-10-13 05:23:21,630 INFO L226 Difference]: Without dead ends: 457 [2020-10-13 05:23:21,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:23:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-10-13 05:23:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 448. [2020-10-13 05:23:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-13 05:23:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 513 transitions. [2020-10-13 05:23:21,645 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 513 transitions. Word has length 257 [2020-10-13 05:23:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:21,645 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 513 transitions. [2020-10-13 05:23:21,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:23:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 513 transitions. [2020-10-13 05:23:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-13 05:23:21,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:21,648 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:21,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:23:21,648 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:21,649 INFO L82 PathProgramCache]: Analyzing trace with hash -774139121, now seen corresponding path program 32 times [2020-10-13 05:23:21,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:21,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852025176] [2020-10-13 05:23:21,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:21,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:21,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:21,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:26,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:26,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-13 05:23:26,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:23:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5263 [2020-10-13 05:23:26,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:23:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 05:23:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:27,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:27,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:27,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:27,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:27,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:27,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:27,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:27,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:27,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:27,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:27,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2852 trivial. 0 not checked. [2020-10-13 05:23:27,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852025176] [2020-10-13 05:23:27,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:27,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:23:27,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544150353] [2020-10-13 05:23:27,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:23:27,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:27,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:23:27,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:23:27,613 INFO L87 Difference]: Start difference. First operand 448 states and 513 transitions. Second operand 35 states. [2020-10-13 05:23:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:28,404 INFO L93 Difference]: Finished difference Result 850 states and 988 transitions. [2020-10-13 05:23:28,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:23:28,405 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 265 [2020-10-13 05:23:28,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:28,407 INFO L225 Difference]: With dead ends: 850 [2020-10-13 05:23:28,408 INFO L226 Difference]: Without dead ends: 471 [2020-10-13 05:23:28,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:23:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-10-13 05:23:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2020-10-13 05:23:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-13 05:23:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 529 transitions. [2020-10-13 05:23:28,424 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 529 transitions. Word has length 265 [2020-10-13 05:23:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:28,425 INFO L479 AbstractCegarLoop]: Abstraction has 462 states and 529 transitions. [2020-10-13 05:23:28,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:23:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 529 transitions. [2020-10-13 05:23:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-13 05:23:28,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:28,427 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:28,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:23:28,427 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:28,428 INFO L82 PathProgramCache]: Analyzing trace with hash 82964614, now seen corresponding path program 33 times [2020-10-13 05:23:28,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:28,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658498123] [2020-10-13 05:23:28,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:28,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:28,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:28,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:34,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:34,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-13 05:23:34,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:23:34,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5587 [2020-10-13 05:23:34,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:23:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 05:23:34,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:34,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:34,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:34,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:34,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:34,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:34,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:34,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:34,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:34,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:34,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:34,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2020-10-13 05:23:34,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658498123] [2020-10-13 05:23:34,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:34,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:23:34,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666718382] [2020-10-13 05:23:34,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:23:34,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:34,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:23:34,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:23:34,772 INFO L87 Difference]: Start difference. First operand 462 states and 529 transitions. Second operand 36 states. [2020-10-13 05:23:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:35,533 INFO L93 Difference]: Finished difference Result 876 states and 1018 transitions. [2020-10-13 05:23:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:23:35,534 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 273 [2020-10-13 05:23:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:35,538 INFO L225 Difference]: With dead ends: 876 [2020-10-13 05:23:35,538 INFO L226 Difference]: Without dead ends: 485 [2020-10-13 05:23:35,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:23:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-13 05:23:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 476. [2020-10-13 05:23:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-13 05:23:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 545 transitions. [2020-10-13 05:23:35,553 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 545 transitions. Word has length 273 [2020-10-13 05:23:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:35,554 INFO L479 AbstractCegarLoop]: Abstraction has 476 states and 545 transitions. [2020-10-13 05:23:35,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:23:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 545 transitions. [2020-10-13 05:23:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-13 05:23:35,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:35,557 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:35,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:23:35,557 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1740526571, now seen corresponding path program 34 times [2020-10-13 05:23:35,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:35,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478534461] [2020-10-13 05:23:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:35,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:35,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:40,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:40,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-13 05:23:40,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:23:40,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 05:23:40,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:23:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 05:23:40,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:41,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:41,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:41,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:41,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:41,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:23:41,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:41,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:41,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:41,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:41,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 3234 trivial. 0 not checked. [2020-10-13 05:23:41,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478534461] [2020-10-13 05:23:41,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:41,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:23:41,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880805108] [2020-10-13 05:23:41,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:23:41,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:41,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:23:41,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:23:41,401 INFO L87 Difference]: Start difference. First operand 476 states and 545 transitions. Second operand 37 states. [2020-10-13 05:23:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:42,269 INFO L93 Difference]: Finished difference Result 902 states and 1048 transitions. [2020-10-13 05:23:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:23:42,270 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 281 [2020-10-13 05:23:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:42,273 INFO L225 Difference]: With dead ends: 902 [2020-10-13 05:23:42,273 INFO L226 Difference]: Without dead ends: 499 [2020-10-13 05:23:42,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:23:42,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-13 05:23:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 490. [2020-10-13 05:23:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-13 05:23:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 561 transitions. [2020-10-13 05:23:42,287 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 561 transitions. Word has length 281 [2020-10-13 05:23:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:42,288 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 561 transitions. [2020-10-13 05:23:42,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:23:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 561 transitions. [2020-10-13 05:23:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-13 05:23:42,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:42,290 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:42,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:23:42,291 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:42,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1431967326, now seen corresponding path program 35 times [2020-10-13 05:23:42,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:42,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738018322] [2020-10-13 05:23:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:42,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:42,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:42,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:47,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:47,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-13 05:23:47,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:23:47,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5328 [2020-10-13 05:23:47,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:47,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:23:47,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:47,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 05:23:47,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:48,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:48,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:48,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:48,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:48,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:48,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:48,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:48,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:48,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 3434 trivial. 0 not checked. [2020-10-13 05:23:48,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738018322] [2020-10-13 05:23:48,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:48,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:23:48,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033644700] [2020-10-13 05:23:48,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:23:48,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:48,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:23:48,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:23:48,440 INFO L87 Difference]: Start difference. First operand 490 states and 561 transitions. Second operand 38 states. [2020-10-13 05:23:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:49,380 INFO L93 Difference]: Finished difference Result 928 states and 1078 transitions. [2020-10-13 05:23:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:23:49,380 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 289 [2020-10-13 05:23:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:49,384 INFO L225 Difference]: With dead ends: 928 [2020-10-13 05:23:49,384 INFO L226 Difference]: Without dead ends: 513 [2020-10-13 05:23:49,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:23:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-10-13 05:23:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 504. [2020-10-13 05:23:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-13 05:23:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 577 transitions. [2020-10-13 05:23:49,398 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 577 transitions. Word has length 289 [2020-10-13 05:23:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:49,398 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 577 transitions. [2020-10-13 05:23:49,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:23:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 577 transitions. [2020-10-13 05:23:49,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-13 05:23:49,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:49,401 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:49,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:23:49,401 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:49,402 INFO L82 PathProgramCache]: Analyzing trace with hash 697580231, now seen corresponding path program 36 times [2020-10-13 05:23:49,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:49,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801618265] [2020-10-13 05:23:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:49,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:49,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:49,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:55,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:55,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-13 05:23:55,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:23:55,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5553 [2020-10-13 05:23:55,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:55,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:23:55,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:55,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 05:23:55,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:55,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:55,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:55,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:55,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:55,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:55,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:55,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:55,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:55,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:55,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:55,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3640 trivial. 0 not checked. [2020-10-13 05:23:55,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801618265] [2020-10-13 05:23:55,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:55,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 05:23:55,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198636813] [2020-10-13 05:23:55,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 05:23:55,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:55,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 05:23:55,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:23:55,838 INFO L87 Difference]: Start difference. First operand 504 states and 577 transitions. Second operand 39 states. [2020-10-13 05:23:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:56,862 INFO L93 Difference]: Finished difference Result 954 states and 1108 transitions. [2020-10-13 05:23:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:23:56,862 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 297 [2020-10-13 05:23:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:56,866 INFO L225 Difference]: With dead ends: 954 [2020-10-13 05:23:56,866 INFO L226 Difference]: Without dead ends: 527 [2020-10-13 05:23:56,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:23:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-10-13 05:23:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 518. [2020-10-13 05:23:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-10-13 05:23:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 593 transitions. [2020-10-13 05:23:56,878 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 593 transitions. Word has length 297 [2020-10-13 05:23:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:56,879 INFO L479 AbstractCegarLoop]: Abstraction has 518 states and 593 transitions. [2020-10-13 05:23:56,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 05:23:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 593 transitions. [2020-10-13 05:23:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-13 05:23:56,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:56,882 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:56,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:23:56,882 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:56,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash 4495550, now seen corresponding path program 37 times [2020-10-13 05:23:56,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:56,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049754337] [2020-10-13 05:23:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:56,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:57,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:57,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking...