/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=BIGGEST --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-tiling/nr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:25:30,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:25:30,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:25:30,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:25:30,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:25:30,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:25:30,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:25:30,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:25:30,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:25:30,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:25:30,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:25:30,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:25:30,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:25:30,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:25:30,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:25:30,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:25:30,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:25:30,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:25:30,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:25:30,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:25:30,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:25:30,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:25:30,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:25:30,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:25:30,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:25:30,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:25:30,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:25:30,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:25:30,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:25:30,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:25:30,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:25:30,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:25:30,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:25:30,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:25:30,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:25:30,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:25:30,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:25:30,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:25:30,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:25:30,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:25:30,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:25:30,849 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 [2020-10-12 10:25:30,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:25:30,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:25:30,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:25:30,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:25:30,909 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:25:30,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:25:30,909 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:25:30,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:25:30,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:25:30,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:25:30,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:25:30,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:25:30,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:25:30,910 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:25:30,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:25:30,911 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:25:30,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:25:30,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:25:30,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:25:30,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:25:30,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:25:30,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:25:30,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:25:30,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:25:30,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:25:30,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:25:30,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:25:30,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:25:30,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:25:30,917 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:25:31,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:25:31,302 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:25:31,313 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:25:31,315 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:25:31,316 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:25:31,317 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr3.c [2020-10-12 10:25:31,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b66e7de0/b9a1bd7e77c24711bcec4a6e8af1126b/FLAG8fa98be93 [2020-10-12 10:25:31,877 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:25:31,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/nr3.c [2020-10-12 10:25:31,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b66e7de0/b9a1bd7e77c24711bcec4a6e8af1126b/FLAG8fa98be93 [2020-10-12 10:25:32,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b66e7de0/b9a1bd7e77c24711bcec4a6e8af1126b [2020-10-12 10:25:32,294 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:25:32,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:25:32,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:25:32,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:25:32,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:25:32,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:25:32" (1/1) ... [2020-10-12 10:25:32,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159a218f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32, skipping insertion in model container [2020-10-12 10:25:32,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:25:32" (1/1) ... [2020-10-12 10:25:32,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:25:32,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:25:32,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:25:32,536 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:25:32,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:25:32,577 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:25:32,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32 WrapperNode [2020-10-12 10:25:32,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:25:32,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:25:32,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:25:32,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:25:32,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32" (1/1) ... [2020-10-12 10:25:32,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32" (1/1) ... [2020-10-12 10:25:32,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32" (1/1) ... [2020-10-12 10:25:32,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32" (1/1) ... [2020-10-12 10:25:32,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32" (1/1) ... [2020-10-12 10:25:32,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32" (1/1) ... [2020-10-12 10:25:32,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32" (1/1) ... [2020-10-12 10:25:32,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:25:32,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:25:32,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:25:32,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:25:32,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32" (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 [2020-10-12 10:25:32,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:25:32,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:25:32,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:25:32,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:25:32,774 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:25:32,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:25:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:25:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:25:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:25:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:25:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:25:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:25:32,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:25:32,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:25:32,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:25:32,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:25:32,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:25:33,087 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:25:33,087 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 10:25:33,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:25:33 BoogieIcfgContainer [2020-10-12 10:25:33,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:25:33,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:25:33,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:25:33,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:25:33,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:25:32" (1/3) ... [2020-10-12 10:25:33,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313d9333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:25:33, skipping insertion in model container [2020-10-12 10:25:33,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:25:32" (2/3) ... [2020-10-12 10:25:33,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313d9333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:25:33, skipping insertion in model container [2020-10-12 10:25:33,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:25:33" (3/3) ... [2020-10-12 10:25:33,104 INFO L109 eAbstractionObserver]: Analyzing ICFG nr3.c [2020-10-12 10:25:33,119 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:25:33,127 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:25:33,143 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:25:33,173 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:25:33,174 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:25:33,174 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:25:33,174 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:25:33,174 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:25:33,175 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:25:33,175 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:25:33,175 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:25:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-12 10:25:33,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:25:33,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:33,209 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] [2020-10-12 10:25:33,210 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1740462776, now seen corresponding path program 1 times [2020-10-12 10:25:33,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:33,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565804627] [2020-10-12 10:25:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:33,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:33,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:33,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:33,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:33,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:25:33,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:25:33,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-12 10:25:33,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:33,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:25:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 10:25:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:25:33,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:25:34,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:34,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:34,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:34,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:34,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:34,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:25:34,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:34,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:34,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:34,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:34,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:34,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:34,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:34,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:25:34,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 10:25:34,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:34,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 10:25:34,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:34,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:34,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565804627] [2020-10-12 10:25:34,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:25:34,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:25:34,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610068568] [2020-10-12 10:25:34,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:25:34,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:34,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:25:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:25:34,081 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-12 10:25:34,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:34,332 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2020-10-12 10:25:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:25:34,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 10:25:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:34,344 INFO L225 Difference]: With dead ends: 69 [2020-10-12 10:25:34,345 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:25:34,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:25:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:25:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-12 10:25:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 10:25:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-12 10:25:34,397 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2020-10-12 10:25:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:34,398 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-12 10:25:34,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:25:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-12 10:25:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:25:34,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:34,400 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] [2020-10-12 10:25:34,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:25:34,401 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1384584959, now seen corresponding path program 1 times [2020-10-12 10:25:34,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:34,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845124319] [2020-10-12 10:25:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:34,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:34,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:34,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:35,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:35,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:25:35,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:25:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-12 10:25:35,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:25:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 10:25:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:25:35,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:35,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:35,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:35,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:35,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:35,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:35,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 10:25:35,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:35,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:25:35,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:35,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:35,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:35,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:35,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:35,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 10:25:35,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:35,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:25:35,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:35,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:25:35,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:25:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:35,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845124319] [2020-10-12 10:25:35,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:25:35,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 10:25:35,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687455149] [2020-10-12 10:25:35,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:25:35,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:25:35,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:25:35,687 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-12 10:25:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:36,134 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-12 10:25:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:25:36,135 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 10:25:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:36,141 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:25:36,141 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:25:36,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:25:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:25:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-10-12 10:25:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:25:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-12 10:25:36,160 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 22 [2020-10-12 10:25:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:36,160 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-12 10:25:36,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:25:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-12 10:25:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:25:36,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:36,162 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] [2020-10-12 10:25:36,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:25:36,163 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash -112997622, now seen corresponding path program 1 times [2020-10-12 10:25:36,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:36,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832525777] [2020-10-12 10:25:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:36,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:36,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:36,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 10:25:36,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:36,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 10:25:36,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:36,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:25:36,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:25:36,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:25:36,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:36,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:36,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:36,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:36,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:36,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:25:36,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:36,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:36,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:36,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:36,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:36,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:36,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:36,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:25:36,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:36,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:36,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:36,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:36,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:36,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832525777] [2020-10-12 10:25:36,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:25:36,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:25:36,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913391626] [2020-10-12 10:25:36,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:25:36,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:36,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:25:36,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:25:36,277 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-10-12 10:25:36,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:36,368 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-12 10:25:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 10:25:36,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-12 10:25:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:36,370 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:25:36,370 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:25:36,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:25:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:25:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-12 10:25:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:25:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-12 10:25:36,382 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 25 [2020-10-12 10:25:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:36,382 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-12 10:25:36,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:25:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-12 10:25:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:25:36,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:36,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:36,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:25:36,384 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1279331720, now seen corresponding path program 1 times [2020-10-12 10:25:36,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:36,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102629644] [2020-10-12 10:25:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:36,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:36,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:36,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:36,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:25:36,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:25:36,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-12 10:25:36,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:36,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:25:36,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:25:36,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:25:36,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:36,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:36,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:36,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:36,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:36,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:36,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:25:36,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:36,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:36,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:36,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:36,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:36,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:36,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:36,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:36,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:25:36,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:36,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:36,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:36,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:36,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:36,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102629644] [2020-10-12 10:25:36,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:36,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:25:36,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161696721] [2020-10-12 10:25:36,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:25:36,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:36,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:25:36,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:25:36,975 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-12 10:25:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:37,274 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-10-12 10:25:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:25:37,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-12 10:25:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:37,277 INFO L225 Difference]: With dead ends: 86 [2020-10-12 10:25:37,277 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:25:37,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:25:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:25:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2020-10-12 10:25:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:25:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-12 10:25:37,291 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 28 [2020-10-12 10:25:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:37,292 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-12 10:25:37,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:25:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-12 10:25:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:25:37,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:37,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:37,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:25:37,294 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:37,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1021166282, now seen corresponding path program 1 times [2020-10-12 10:25:37,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:37,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148526609] [2020-10-12 10:25:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:37,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:37,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:37,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:37,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:37,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:25:37,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:25:37,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-12 10:25:37,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:37,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:25:37,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:25:37,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:25:37,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:37,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:37,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:37,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:37,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:37,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:37,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:25:37,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:37,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:37,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:37,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:37,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:37,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:37,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:37,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:25:37,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:37,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:37,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:37,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:37,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148526609] [2020-10-12 10:25:37,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:37,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:25:37,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16596273] [2020-10-12 10:25:37,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:25:37,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:37,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:25:37,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:25:37,751 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-10-12 10:25:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:38,204 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2020-10-12 10:25:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:25:38,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 10:25:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:38,207 INFO L225 Difference]: With dead ends: 90 [2020-10-12 10:25:38,207 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 10:25:38,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:25:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 10:25:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2020-10-12 10:25:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:25:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-12 10:25:38,222 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 28 [2020-10-12 10:25:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:38,222 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-12 10:25:38,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:25:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-12 10:25:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:25:38,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:38,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:38,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:25:38,224 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:38,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:38,224 INFO L82 PathProgramCache]: Analyzing trace with hash -994855160, now seen corresponding path program 1 times [2020-10-12 10:25:38,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:38,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387305757] [2020-10-12 10:25:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:38,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:38,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:38,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:39,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:39,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:25:39,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:25:39,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-12 10:25:39,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:39,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:25:39,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:25:39,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:25:39,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:39,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:39,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:39,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:39,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:39,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:39,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:25:39,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:39,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:39,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:39,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:39,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:39,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:39,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:39,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:39,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:39,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:39,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:25:39,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:39,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:39,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:39,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:39,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387305757] [2020-10-12 10:25:39,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:39,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:25:39,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821560241] [2020-10-12 10:25:39,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:25:39,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:39,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:25:39,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:25:39,231 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 9 states. [2020-10-12 10:25:39,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:39,669 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-10-12 10:25:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:25:39,670 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-12 10:25:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:39,672 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:25:39,673 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 10:25:39,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:25:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 10:25:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 58. [2020-10-12 10:25:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:25:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-12 10:25:39,711 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 31 [2020-10-12 10:25:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:39,714 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-12 10:25:39,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:25:39,714 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-12 10:25:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:25:39,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:39,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:39,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:25:39,719 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:39,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1762083020, now seen corresponding path program 2 times [2020-10-12 10:25:39,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:39,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697217187] [2020-10-12 10:25:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:39,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:39,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:39,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:39,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:39,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:40,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:40,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:40,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:40,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:40,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:25:40,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:25:40,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1188 [2020-10-12 10:25:40,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:40,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:25:40,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:25:40,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:25:40,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:41,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:41,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:41,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:41,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:41,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:25:41,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:41,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:41,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:41,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:41,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:41,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:41,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:41,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:25:41,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:41,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:41,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:41,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697217187] [2020-10-12 10:25:41,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:41,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:25:41,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635354377] [2020-10-12 10:25:41,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:25:41,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:41,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:25:41,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:25:41,125 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 11 states. [2020-10-12 10:25:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:41,645 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2020-10-12 10:25:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:25:41,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-12 10:25:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:41,648 INFO L225 Difference]: With dead ends: 99 [2020-10-12 10:25:41,648 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 10:25:41,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:25:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 10:25:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 61. [2020-10-12 10:25:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 10:25:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-10-12 10:25:41,660 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-10-12 10:25:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:41,661 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-10-12 10:25:41,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:25:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-10-12 10:25:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:25:41,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:41,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:41,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:25:41,663 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:41,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1906551953, now seen corresponding path program 3 times [2020-10-12 10:25:41,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:41,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636989774] [2020-10-12 10:25:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:41,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:41,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:41,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:41,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:41,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:42,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:42,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:43,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:43,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:25:43,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:25:43,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1808 [2020-10-12 10:25:43,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:43,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:25:43,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:25:43,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:25:43,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:43,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:43,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:43,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:43,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:43,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:43,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:25:43,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:43,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:43,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:43,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:43,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:43,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:43,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:43,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:43,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:43,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:25:43,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:43,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:43,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:25:43,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636989774] [2020-10-12 10:25:43,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:43,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:25:43,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377842132] [2020-10-12 10:25:43,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:25:43,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:25:43,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:25:43,692 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2020-10-12 10:25:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:44,415 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-10-12 10:25:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:25:44,416 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-12 10:25:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:44,417 INFO L225 Difference]: With dead ends: 104 [2020-10-12 10:25:44,418 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 10:25:44,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:25:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 10:25:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 51. [2020-10-12 10:25:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:25:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-12 10:25:44,445 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 34 [2020-10-12 10:25:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:44,445 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-12 10:25:44,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:25:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-12 10:25:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:25:44,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:44,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:44,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:25:44,447 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash -378315451, now seen corresponding path program 1 times [2020-10-12 10:25:44,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:44,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6021713] [2020-10-12 10:25:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:44,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:44,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:44,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:44,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:25:44,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:25:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-12 10:25:44,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:25:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:25:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:25:44,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:44,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:44,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:44,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:44,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:44,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:25:44,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:44,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:44,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:44,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:44,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:44,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:44,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:44,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:25:44,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:44,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:25:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:25:44,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:44,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 10:25:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:44,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:44,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:44,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:44,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:44,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:25:44,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:44,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:44,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:25:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:44,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:25:44,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6021713] [2020-10-12 10:25:44,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:44,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 10:25:44,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597798439] [2020-10-12 10:25:44,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:25:44,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:44,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:25:44,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:25:44,693 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 6 states. [2020-10-12 10:25:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:44,814 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-10-12 10:25:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:25:44,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-12 10:25:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:44,816 INFO L225 Difference]: With dead ends: 91 [2020-10-12 10:25:44,816 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 10:25:44,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:25:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 10:25:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-12 10:25:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 10:25:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-12 10:25:44,828 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 37 [2020-10-12 10:25:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:44,828 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-12 10:25:44,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:25:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-12 10:25:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:25:44,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:44,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:44,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:25:44,842 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:44,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:44,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1324006069, now seen corresponding path program 1 times [2020-10-12 10:25:44,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:44,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340719807] [2020-10-12 10:25:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:44,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:44,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:44,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:45,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:45,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:45,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:45,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:25:45,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:25:45,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-10-12 10:25:45,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:25:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:25:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:25:45,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:45,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:45,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:45,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:45,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:45,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:45,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:25:45,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:45,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:45,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:45,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:45,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:45,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:45,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:45,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:45,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:45,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:45,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:25:45,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:45,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:45,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:25:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:45,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:45,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:45,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:45,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:45,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:25:45,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:45,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:25:45,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:45,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:25:45,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:45,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340719807] [2020-10-12 10:25:45,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:45,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:25:45,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882655574] [2020-10-12 10:25:45,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:25:45,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:45,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:25:45,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:25:45,939 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 13 states. [2020-10-12 10:25:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:47,059 INFO L93 Difference]: Finished difference Result 148 states and 185 transitions. [2020-10-12 10:25:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:25:47,060 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-12 10:25:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:47,061 INFO L225 Difference]: With dead ends: 148 [2020-10-12 10:25:47,062 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 10:25:47,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:25:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 10:25:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2020-10-12 10:25:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 10:25:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 131 transitions. [2020-10-12 10:25:47,088 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 131 transitions. Word has length 40 [2020-10-12 10:25:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:47,088 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 131 transitions. [2020-10-12 10:25:47,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:25:47,089 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 131 transitions. [2020-10-12 10:25:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:25:47,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:47,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:47,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:25:47,092 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1189992563, now seen corresponding path program 1 times [2020-10-12 10:25:47,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:47,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884380333] [2020-10-12 10:25:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:47,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:47,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:47,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:47,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:47,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:48,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:49,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:49,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:49,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:25:49,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:25:49,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2861 [2020-10-12 10:25:49,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:49,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:25:49,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:25:49,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:25:49,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:50,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:50,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:50,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:50,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:50,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:50,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:25:50,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:50,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:50,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:50,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:50,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:50,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:50,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:25:50,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:50,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:50,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:50,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:50,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:50,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:25:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:50,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:50,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:50,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:50,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:50,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:25:50,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:50,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:25:50,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:50,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:25:50,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:25:50,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884380333] [2020-10-12 10:25:50,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:50,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:25:50,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540593508] [2020-10-12 10:25:50,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:25:50,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:50,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:25:50,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:25:50,215 INFO L87 Difference]: Start difference. First operand 102 states and 131 transitions. Second operand 14 states. [2020-10-12 10:25:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:51,682 INFO L93 Difference]: Finished difference Result 223 states and 288 transitions. [2020-10-12 10:25:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:25:51,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-12 10:25:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:51,685 INFO L225 Difference]: With dead ends: 223 [2020-10-12 10:25:51,686 INFO L226 Difference]: Without dead ends: 221 [2020-10-12 10:25:51,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:25:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-12 10:25:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 136. [2020-10-12 10:25:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 10:25:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2020-10-12 10:25:51,728 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 40 [2020-10-12 10:25:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:51,729 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2020-10-12 10:25:51,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:25:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2020-10-12 10:25:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:25:51,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:51,732 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:25:51,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:25:51,733 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:51,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1149798824, now seen corresponding path program 2 times [2020-10-12 10:25:51,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:51,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690283361] [2020-10-12 10:25:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:51,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:51,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:51,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:52,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:52,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:52,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:53,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:54,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:54,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:25:54,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:25:54,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3221 [2020-10-12 10:25:54,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:25:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:25:54,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:25:54,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:55,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:25:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:55,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:55,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:55,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:25:55,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:25:55,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:55,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:55,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:55,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:25:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:55,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:55,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:55,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:55,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:25:55,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:55,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:25:55,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:55,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:25:55,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:55,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:25:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:55,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:55,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:55,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:55,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:55,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:25:55,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:55,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:25:55,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:55,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:25:55,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:25:55,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:25:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:55,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:55,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:25:55,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:25:55,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:25:55,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:25:55,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:25:55,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:25:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:25:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:25:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:25:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:25:55,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690283361] [2020-10-12 10:25:55,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:25:55,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:25:55,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463069972] [2020-10-12 10:25:55,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:25:55,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:25:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:25:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:25:55,358 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand 17 states. [2020-10-12 10:25:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:25:56,649 INFO L93 Difference]: Finished difference Result 242 states and 323 transitions. [2020-10-12 10:25:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:25:56,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-12 10:25:56,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:25:56,652 INFO L225 Difference]: With dead ends: 242 [2020-10-12 10:25:56,652 INFO L226 Difference]: Without dead ends: 240 [2020-10-12 10:25:56,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:25:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-12 10:25:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2020-10-12 10:25:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-12 10:25:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 281 transitions. [2020-10-12 10:25:56,690 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 281 transitions. Word has length 49 [2020-10-12 10:25:56,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:25:56,690 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 281 transitions. [2020-10-12 10:25:56,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:25:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 281 transitions. [2020-10-12 10:25:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:25:56,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:25:56,692 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1, 1, 1, 1, 1] [2020-10-12 10:25:56,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:25:56,692 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:25:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:25:56,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1077412266, now seen corresponding path program 2 times [2020-10-12 10:25:56,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:25:56,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260309178] [2020-10-12 10:25:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:25:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:25:56,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:56,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:56,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:56,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:56,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:57,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:57,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:58,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:25:59,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:00,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:01,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:01,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:26:01,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:26:01,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:26:01,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:26:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:26:01,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:01,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:01,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:01,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:01,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:01,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:01,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:01,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:01,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:01,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:01,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:01,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:01,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:01,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:01,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:01,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:01,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:01,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:01,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:01,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:01,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:01,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:01,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:01,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:01,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:01,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:01,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:01,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:01,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:01,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:01,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:01,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:01,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:01,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:01,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:26:01,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:01,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:26:01,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260309178] [2020-10-12 10:26:01,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:01,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:26:01,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951716752] [2020-10-12 10:26:01,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:26:01,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:26:01,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:26:01,989 INFO L87 Difference]: Start difference. First operand 212 states and 281 transitions. Second operand 14 states. [2020-10-12 10:26:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:03,373 INFO L93 Difference]: Finished difference Result 407 states and 539 transitions. [2020-10-12 10:26:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:26:03,376 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-12 10:26:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:03,379 INFO L225 Difference]: With dead ends: 407 [2020-10-12 10:26:03,380 INFO L226 Difference]: Without dead ends: 234 [2020-10-12 10:26:03,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:26:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-12 10:26:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 156. [2020-10-12 10:26:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 10:26:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2020-10-12 10:26:03,418 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 49 [2020-10-12 10:26:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:03,420 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2020-10-12 10:26:03,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:26:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2020-10-12 10:26:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:03,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:03,421 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1, 1, 1, 1, 1] [2020-10-12 10:26:03,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:26:03,421 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash 66295016, now seen corresponding path program 3 times [2020-10-12 10:26:03,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:03,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276432470] [2020-10-12 10:26:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:03,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:03,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:03,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:03,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:04,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:04,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:04,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:04,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:05,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:05,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:06,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:06,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:26:06,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:26:06,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2975 [2020-10-12 10:26:06,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:26:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:26:06,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:06,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:06,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:06,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:06,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:06,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:06,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:06,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:06,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:06,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:06,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:06,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:06,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:06,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:06,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:06,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:06,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:06,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:06,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:06,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:06,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:06,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:06,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:06,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:06,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:06,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:06,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:06,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:06,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:06,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:06,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:06,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:06,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:06,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:06,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:06,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:06,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:06,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:26:06,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276432470] [2020-10-12 10:26:06,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:06,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:26:06,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933187104] [2020-10-12 10:26:06,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:26:06,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:26:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:26:06,820 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand 16 states. [2020-10-12 10:26:08,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:08,142 INFO L93 Difference]: Finished difference Result 229 states and 292 transitions. [2020-10-12 10:26:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:26:08,149 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-12 10:26:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:08,152 INFO L225 Difference]: With dead ends: 229 [2020-10-12 10:26:08,152 INFO L226 Difference]: Without dead ends: 227 [2020-10-12 10:26:08,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:26:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-12 10:26:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 177. [2020-10-12 10:26:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 10:26:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 224 transitions. [2020-10-12 10:26:08,191 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 224 transitions. Word has length 49 [2020-10-12 10:26:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:08,191 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 224 transitions. [2020-10-12 10:26:08,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:26:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 224 transitions. [2020-10-12 10:26:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:08,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:08,193 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:08,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:26:08,194 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:08,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:08,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1104156612, now seen corresponding path program 3 times [2020-10-12 10:26:08,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:08,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14754704] [2020-10-12 10:26:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:08,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:09,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:10,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:11,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:12,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:13,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:13,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:26:13,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-12 10:26:13,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:26:13,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:26:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 10:26:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:26:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:14,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:14,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:14,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:14,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:14,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:14,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:14,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:14,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:14,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:14,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:14,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:14,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:14,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:14,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:14,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:14,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:14,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:26:14,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:14,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:14,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:14,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:14,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:14,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:14,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:14,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:14,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:14,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:14,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:14,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:14,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:14,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14754704] [2020-10-12 10:26:14,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:14,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:26:14,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504315120] [2020-10-12 10:26:14,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:26:14,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:14,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:26:14,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:26:14,128 INFO L87 Difference]: Start difference. First operand 177 states and 224 transitions. Second operand 19 states. [2020-10-12 10:26:16,229 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-12 10:26:16,442 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-12 10:26:16,714 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-12 10:26:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:17,766 INFO L93 Difference]: Finished difference Result 282 states and 359 transitions. [2020-10-12 10:26:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:26:17,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-12 10:26:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:17,769 INFO L225 Difference]: With dead ends: 282 [2020-10-12 10:26:17,770 INFO L226 Difference]: Without dead ends: 256 [2020-10-12 10:26:17,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:26:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-12 10:26:17,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 164. [2020-10-12 10:26:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-12 10:26:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2020-10-12 10:26:17,806 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 49 [2020-10-12 10:26:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:17,807 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2020-10-12 10:26:17,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:26:17,807 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2020-10-12 10:26:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:17,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:17,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:17,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:26:17,809 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:17,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:17,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1042529664, now seen corresponding path program 4 times [2020-10-12 10:26:17,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:17,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73962317] [2020-10-12 10:26:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:17,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:17,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:17,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:17,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:17,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:18,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:18,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:18,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:18,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:18,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:19,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:19,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:19,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:20,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:21,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:21,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:22,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:22,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:26:22,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:26:22,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:26:22,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:26:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:26:22,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:23,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:23,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:23,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:23,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:23,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:23,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:23,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:23,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:23,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:23,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:23,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:23,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:23,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:23,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:23,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:23,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:23,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:23,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:23,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:23,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:23,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:23,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:23,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:23,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:26:23,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:23,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:26:23,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73962317] [2020-10-12 10:26:23,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:23,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:26:23,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348190864] [2020-10-12 10:26:23,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:26:23,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:26:23,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:26:23,220 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand 18 states. [2020-10-12 10:26:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:24,938 INFO L93 Difference]: Finished difference Result 233 states and 292 transitions. [2020-10-12 10:26:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:26:24,941 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-12 10:26:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:24,943 INFO L225 Difference]: With dead ends: 233 [2020-10-12 10:26:24,943 INFO L226 Difference]: Without dead ends: 231 [2020-10-12 10:26:24,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:26:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-12 10:26:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 176. [2020-10-12 10:26:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-12 10:26:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 222 transitions. [2020-10-12 10:26:24,974 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 222 transitions. Word has length 49 [2020-10-12 10:26:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:24,975 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 222 transitions. [2020-10-12 10:26:24,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:26:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 222 transitions. [2020-10-12 10:26:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:24,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:24,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1] [2020-10-12 10:26:24,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:26:24,977 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2053646914, now seen corresponding path program 1 times [2020-10-12 10:26:24,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:24,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239123370] [2020-10-12 10:26:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:24,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:24,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:26:27,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:26:27,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2496 [2020-10-12 10:26:27,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:26:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:26:27,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:27,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:27,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:27,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:27,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:27,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:27,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:27,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:27,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:27,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:27,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:27,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:27,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239123370] [2020-10-12 10:26:27,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:27,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:26:27,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519937492] [2020-10-12 10:26:27,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:26:27,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:27,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:26:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:26:27,787 INFO L87 Difference]: Start difference. First operand 176 states and 222 transitions. Second operand 17 states. [2020-10-12 10:26:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:29,832 INFO L93 Difference]: Finished difference Result 306 states and 394 transitions. [2020-10-12 10:26:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 10:26:29,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-12 10:26:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:29,836 INFO L225 Difference]: With dead ends: 306 [2020-10-12 10:26:29,836 INFO L226 Difference]: Without dead ends: 304 [2020-10-12 10:26:29,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=397, Invalid=2255, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:26:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-12 10:26:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 198. [2020-10-12 10:26:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 10:26:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 251 transitions. [2020-10-12 10:26:29,871 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 251 transitions. Word has length 49 [2020-10-12 10:26:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:29,871 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 251 transitions. [2020-10-12 10:26:29,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:26:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 251 transitions. [2020-10-12 10:26:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:26:29,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:29,872 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:29,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:26:29,872 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 235171667, now seen corresponding path program 5 times [2020-10-12 10:26:29,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:29,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890422437] [2020-10-12 10:26:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:29,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:32,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 10:26:32,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:26:32,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2555 [2020-10-12 10:26:32,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:26:32,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 10:26:32,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:26:32,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:32,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:32,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:32,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:32,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:32,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:32,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:32,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:32,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:32,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:32,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:32,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:32,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:32,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:32,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:32,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:32,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:32,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:32,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:32,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:32,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:32,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:32,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:32,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:32,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:32,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:32,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:32,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:32,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:32,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:32,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:32,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:26:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:32,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:32,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:32,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:32,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:32,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-12 10:26:32,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890422437] [2020-10-12 10:26:32,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:32,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:26:32,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332658579] [2020-10-12 10:26:32,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:26:32,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:32,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:26:32,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:26:32,683 INFO L87 Difference]: Start difference. First operand 198 states and 251 transitions. Second operand 13 states. [2020-10-12 10:26:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:33,265 INFO L93 Difference]: Finished difference Result 337 states and 423 transitions. [2020-10-12 10:26:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:26:33,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-12 10:26:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:33,267 INFO L225 Difference]: With dead ends: 337 [2020-10-12 10:26:33,267 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 10:26:33,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:26:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 10:26:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 204. [2020-10-12 10:26:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-12 10:26:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 257 transitions. [2020-10-12 10:26:33,297 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 257 transitions. Word has length 58 [2020-10-12 10:26:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:33,298 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 257 transitions. [2020-10-12 10:26:33,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:26:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 257 transitions. [2020-10-12 10:26:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:26:33,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:33,299 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 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, 1, 1] [2020-10-12 10:26:33,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:26:33,300 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash -221172737, now seen corresponding path program 6 times [2020-10-12 10:26:33,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:33,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614393977] [2020-10-12 10:26:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:33,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:34,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:34,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:38,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:26:38,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 10:26:38,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-12 10:26:38,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:26:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 10:26:38,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:38,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:38,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:38,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:38,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:38,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 10:26:38,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:38,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:38,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:38,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:38,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:38,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:38,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:38,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:38,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:38,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:38,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:38,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:38,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:38,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:38,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:38,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:38,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:38,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:38,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:38,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:38,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:38,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:38,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:38,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:38,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:38,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:26:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:38,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:38,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:38,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:38,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:26:38,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:26:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:38,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:26:39,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614393977] [2020-10-12 10:26:39,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:39,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:26:39,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513182248] [2020-10-12 10:26:39,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:26:39,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:26:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:26:39,003 INFO L87 Difference]: Start difference. First operand 204 states and 257 transitions. Second operand 20 states. [2020-10-12 10:26:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:41,923 INFO L93 Difference]: Finished difference Result 295 states and 377 transitions. [2020-10-12 10:26:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:26:41,924 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-10-12 10:26:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:41,927 INFO L225 Difference]: With dead ends: 295 [2020-10-12 10:26:41,927 INFO L226 Difference]: Without dead ends: 293 [2020-10-12 10:26:41,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=414, Invalid=2448, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:26:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-12 10:26:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 238. [2020-10-12 10:26:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-12 10:26:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 302 transitions. [2020-10-12 10:26:41,971 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 302 transitions. Word has length 58 [2020-10-12 10:26:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:41,971 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 302 transitions. [2020-10-12 10:26:41,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:26:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 302 transitions. [2020-10-12 10:26:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:26:41,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:41,973 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 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, 1, 1, 1] [2020-10-12 10:26:41,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:26:41,974 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash -984143493, now seen corresponding path program 7 times [2020-10-12 10:26:41,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:41,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382009046] [2020-10-12 10:26:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:41,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:46,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:46,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:46,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:46,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:26:46,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-12 10:26:46,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:26:46,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:26:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 10:26:46,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:47,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:47,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:47,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:47,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:47,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:47,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:47,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:47,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:47,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:47,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:47,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:47,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:47,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:47,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:47,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:47,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:47,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:47,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:47,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:47,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:47,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:47,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:47,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:47,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:47,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:26:47,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:47,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:47,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:47,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:26:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:47,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:47,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:47,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:47,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:47,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:47,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:26:47,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382009046] [2020-10-12 10:26:47,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:47,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:26:47,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520836747] [2020-10-12 10:26:47,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:26:47,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:47,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:26:47,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:26:47,518 INFO L87 Difference]: Start difference. First operand 238 states and 302 transitions. Second operand 20 states. [2020-10-12 10:26:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:49,934 INFO L93 Difference]: Finished difference Result 314 states and 407 transitions. [2020-10-12 10:26:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:26:49,934 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-10-12 10:26:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:49,936 INFO L225 Difference]: With dead ends: 314 [2020-10-12 10:26:49,937 INFO L226 Difference]: Without dead ends: 312 [2020-10-12 10:26:49,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=355, Invalid=2401, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:26:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-12 10:26:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 243. [2020-10-12 10:26:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-12 10:26:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 309 transitions. [2020-10-12 10:26:49,976 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 309 transitions. Word has length 58 [2020-10-12 10:26:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:49,976 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 309 transitions. [2020-10-12 10:26:49,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:26:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 309 transitions. [2020-10-12 10:26:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:26:49,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:49,978 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 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, 1, 1, 1] [2020-10-12 10:26:49,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:26:49,978 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:49,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1778464577, now seen corresponding path program 8 times [2020-10-12 10:26:49,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:49,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627937534] [2020-10-12 10:26:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:49,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:51,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:51,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:51,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:51,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:51,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:54,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:54,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:54,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:54,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:26:54,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-12 10:26:54,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:26:54,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:54,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:26:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 10:26:54,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:55,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:55,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:55,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:55,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:55,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:55,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:55,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:55,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:55,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:55,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:55,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:55,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:55,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:55,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:55,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:55,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:55,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:55,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:55,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:55,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:55,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:55,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:26:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:55,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:55,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:55,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:55,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:55,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:55,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:55,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:26:55,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:55,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:55,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 10:26:55,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627937534] [2020-10-12 10:26:55,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:55,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:26:55,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719853311] [2020-10-12 10:26:55,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:26:55,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:55,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:26:55,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:26:55,523 INFO L87 Difference]: Start difference. First operand 243 states and 309 transitions. Second operand 17 states. [2020-10-12 10:26:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:58,040 INFO L93 Difference]: Finished difference Result 284 states and 364 transitions. [2020-10-12 10:26:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:26:58,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-12 10:26:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:58,043 INFO L225 Difference]: With dead ends: 284 [2020-10-12 10:26:58,044 INFO L226 Difference]: Without dead ends: 282 [2020-10-12 10:26:58,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:26:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-12 10:26:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 209. [2020-10-12 10:26:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-12 10:26:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 264 transitions. [2020-10-12 10:26:58,089 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 264 transitions. Word has length 58 [2020-10-12 10:26:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:58,089 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 264 transitions. [2020-10-12 10:26:58,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:26:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 264 transitions. [2020-10-12 10:26:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:26:58,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:58,091 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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, 1, 1] [2020-10-12 10:26:58,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:26:58,092 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1505385469, now seen corresponding path program 2 times [2020-10-12 10:26:58,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:58,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964624755] [2020-10-12 10:26:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:58,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:00,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:00,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:01,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:01,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:01,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:27:02,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 10:27:02,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4612 [2020-10-12 10:27:02,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:27:02,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:02,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 10:27:02,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:03,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:03,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:03,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:03,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:03,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:03,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:03,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:03,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:03,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:03,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:03,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:03,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:03,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:03,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:03,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:03,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:03,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:03,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:03,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:03,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:03,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:03,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:03,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:03,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:03,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:03,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:03,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:03,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:03,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:03,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:03,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:03,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:03,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:03,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:27:03,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964624755] [2020-10-12 10:27:03,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:03,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:27:03,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83027797] [2020-10-12 10:27:03,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:27:03,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:03,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:27:03,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:27:03,261 INFO L87 Difference]: Start difference. First operand 209 states and 264 transitions. Second operand 18 states. [2020-10-12 10:27:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:05,395 INFO L93 Difference]: Finished difference Result 326 states and 416 transitions. [2020-10-12 10:27:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:27:05,397 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-12 10:27:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:05,400 INFO L225 Difference]: With dead ends: 326 [2020-10-12 10:27:05,401 INFO L226 Difference]: Without dead ends: 324 [2020-10-12 10:27:05,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=297, Invalid=1865, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:27:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-12 10:27:05,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 192. [2020-10-12 10:27:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 10:27:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2020-10-12 10:27:05,442 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 58 [2020-10-12 10:27:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:05,443 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2020-10-12 10:27:05,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:27:05,443 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2020-10-12 10:27:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:05,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:05,444 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-10-12 10:27:05,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:27:05,444 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:05,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1866956508, now seen corresponding path program 9 times [2020-10-12 10:27:05,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:05,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225598766] [2020-10-12 10:27:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:06,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:07,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:27:10,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:27:10,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:27:10,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:27:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 10:27:10,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:10,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:10,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:10,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:10,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:10,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:10,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:10,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:10,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:10,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:10,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:10,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:10,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:10,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:10,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:10,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:10,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:10,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:10,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:10,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:10,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:10,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:10,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:10,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:10,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:10,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:10,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:10,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:10,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:10,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:10,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:10,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:10,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:10,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:10,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:10,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:10,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:27:10,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225598766] [2020-10-12 10:27:10,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:10,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:27:10,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687239373] [2020-10-12 10:27:10,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:27:10,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:10,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:27:10,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:27:10,864 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand 17 states. [2020-10-12 10:27:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:12,327 INFO L93 Difference]: Finished difference Result 338 states and 433 transitions. [2020-10-12 10:27:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:27:12,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-10-12 10:27:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:12,331 INFO L225 Difference]: With dead ends: 338 [2020-10-12 10:27:12,331 INFO L226 Difference]: Without dead ends: 319 [2020-10-12 10:27:12,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:27:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-12 10:27:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 269. [2020-10-12 10:27:12,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-12 10:27:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 344 transitions. [2020-10-12 10:27:12,401 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 344 transitions. Word has length 67 [2020-10-12 10:27:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:12,401 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 344 transitions. [2020-10-12 10:27:12,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:27:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 344 transitions. [2020-10-12 10:27:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:12,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:12,403 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:12,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:27:12,403 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2115103002, now seen corresponding path program 10 times [2020-10-12 10:27:12,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:12,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220399078] [2020-10-12 10:27:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:12,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:12,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:12,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:12,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:12,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:12,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:12,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:13,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:13,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:13,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:13,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:13,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:15,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:17,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:27:17,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:27:17,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:27:17,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:27:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 10:27:17,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:17,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:17,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:17,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:17,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:17,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:17,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:17,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:17,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:17,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:17,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:17,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:17,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:17,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:17,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:17,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:17,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:17,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:17,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:17,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:17,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:17,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:17,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:17,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:17,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:17,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:17,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:17,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:17,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:17,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:17,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:17,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:17,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:17,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:17,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:17,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:17,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:17,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:17,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:17,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:17,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:17,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:17,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-12 10:27:17,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220399078] [2020-10-12 10:27:17,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:17,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:27:17,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338101198] [2020-10-12 10:27:17,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:27:17,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:17,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:27:17,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:27:17,632 INFO L87 Difference]: Start difference. First operand 269 states and 344 transitions. Second operand 14 states. [2020-10-12 10:27:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:18,620 INFO L93 Difference]: Finished difference Result 424 states and 551 transitions. [2020-10-12 10:27:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:27:18,621 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-12 10:27:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:18,623 INFO L225 Difference]: With dead ends: 424 [2020-10-12 10:27:18,624 INFO L226 Difference]: Without dead ends: 422 [2020-10-12 10:27:18,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:27:18,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-12 10:27:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 312. [2020-10-12 10:27:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-12 10:27:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 401 transitions. [2020-10-12 10:27:18,714 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 401 transitions. Word has length 67 [2020-10-12 10:27:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:18,714 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 401 transitions. [2020-10-12 10:27:18,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:27:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 401 transitions. [2020-10-12 10:27:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:18,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:18,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:18,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:27:18,718 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:18,718 INFO L82 PathProgramCache]: Analyzing trace with hash -161629602, now seen corresponding path program 11 times [2020-10-12 10:27:18,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:18,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349361481] [2020-10-12 10:27:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:18,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:20,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:20,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:23,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:23,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:27:23,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 10:27:23,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:27:23,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:23,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:27:23,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:23,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:27:23,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:24,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:24,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:24,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:24,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:24,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:24,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:24,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:24,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:24,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:24,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:27:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:27:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:24,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:27:24,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:27:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:24,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 10:27:24,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349361481] [2020-10-12 10:27:24,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:24,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:27:24,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730484998] [2020-10-12 10:27:24,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:27:24,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:27:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:27:24,165 INFO L87 Difference]: Start difference. First operand 312 states and 401 transitions. Second operand 16 states. [2020-10-12 10:27:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:25,150 INFO L93 Difference]: Finished difference Result 420 states and 538 transitions. [2020-10-12 10:27:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:27:25,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-12 10:27:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:25,153 INFO L225 Difference]: With dead ends: 420 [2020-10-12 10:27:25,153 INFO L226 Difference]: Without dead ends: 359 [2020-10-12 10:27:25,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:27:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-12 10:27:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 301. [2020-10-12 10:27:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-12 10:27:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 383 transitions. [2020-10-12 10:27:25,221 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 383 transitions. Word has length 67 [2020-10-12 10:27:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:25,222 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 383 transitions. [2020-10-12 10:27:25,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:27:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 383 transitions. [2020-10-12 10:27:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:25,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:25,223 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:25,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:27:25,224 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash -955950686, now seen corresponding path program 12 times [2020-10-12 10:27:25,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:25,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551724013] [2020-10-12 10:27:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:26,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:26,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:26,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:27,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:27,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:27,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:27,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:30,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:27:30,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-12 10:27:30,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:27:30,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:30,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:27:30,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:30,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 10:27:30,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:30,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:30,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:30,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:30,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:30,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:30,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:30,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:30,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:30,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:30,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:30,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:30,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:30,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:30,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:30,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:30,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:30,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:30,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:30,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:30,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:30,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:30,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:30,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:30,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:30,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:30,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:30,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:30,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:30,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:30,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:30,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:30,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:30,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:30,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:30,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:30,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:30,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:30,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:30,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:30,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:27:30,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:27:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:30,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 10:27:30,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551724013] [2020-10-12 10:27:30,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:30,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:27:30,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682791295] [2020-10-12 10:27:30,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:27:30,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:30,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:27:30,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:27:30,727 INFO L87 Difference]: Start difference. First operand 301 states and 383 transitions. Second operand 19 states. [2020-10-12 10:27:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:32,724 INFO L93 Difference]: Finished difference Result 498 states and 637 transitions. [2020-10-12 10:27:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:27:32,726 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-10-12 10:27:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:32,728 INFO L225 Difference]: With dead ends: 498 [2020-10-12 10:27:32,729 INFO L226 Difference]: Without dead ends: 436 [2020-10-12 10:27:32,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:27:32,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-12 10:27:32,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 362. [2020-10-12 10:27:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-12 10:27:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 460 transitions. [2020-10-12 10:27:32,792 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 460 transitions. Word has length 67 [2020-10-12 10:27:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:32,793 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 460 transitions. [2020-10-12 10:27:32,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:27:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 460 transitions. [2020-10-12 10:27:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:27:32,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:32,795 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:32,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:27:32,795 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1967067936, now seen corresponding path program 13 times [2020-10-12 10:27:32,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:32,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263071292] [2020-10-12 10:27:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:32,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:32,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:32,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:32,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:32,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:32,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:33,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:33,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:33,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:33,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:34,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:36,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 10:27:36,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:27:36,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3705 [2020-10-12 10:27:36,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:27:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 10:27:36,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:36,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:36,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:36,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:36,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:36,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:36,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:36,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:36,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:36,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:36,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:36,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:36,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:36,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:36,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:36,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:36,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:36,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:36,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:36,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:27:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:36,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:36,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:36,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:36,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:36,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:36,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:36,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:27:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:36,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:36,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:36,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:36,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:36,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:36,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:36,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:36,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:36,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:36,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:27:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:36,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:36,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:36,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:36,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 10:27:36,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263071292] [2020-10-12 10:27:36,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:36,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:27:36,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244788087] [2020-10-12 10:27:36,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:27:36,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:27:36,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:27:36,967 INFO L87 Difference]: Start difference. First operand 362 states and 460 transitions. Second operand 19 states. [2020-10-12 10:27:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:40,016 INFO L93 Difference]: Finished difference Result 869 states and 1140 transitions. [2020-10-12 10:27:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:27:40,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-10-12 10:27:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:40,021 INFO L225 Difference]: With dead ends: 869 [2020-10-12 10:27:40,021 INFO L226 Difference]: Without dead ends: 867 [2020-10-12 10:27:40,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=387, Invalid=2583, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 10:27:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-10-12 10:27:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 493. [2020-10-12 10:27:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-12 10:27:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 649 transitions. [2020-10-12 10:27:40,132 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 649 transitions. Word has length 67 [2020-10-12 10:27:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:40,133 INFO L479 AbstractCegarLoop]: Abstraction has 493 states and 649 transitions. [2020-10-12 10:27:40,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:27:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 649 transitions. [2020-10-12 10:27:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:27:40,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:40,135 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:40,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:27:40,135 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:40,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1735114054, now seen corresponding path program 14 times [2020-10-12 10:27:40,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:40,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865740022] [2020-10-12 10:27:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:40,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:42,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:42,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:43,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:43,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:43,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:44,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:27:45,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 10:27:45,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:27:45,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:27:45,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:45,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 10:27:45,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:45,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:45,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:45,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:27:45,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:27:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:45,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:45,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:27:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:45,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:45,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:45,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:27:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:45,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:45,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:45,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:27:45,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865740022] [2020-10-12 10:27:45,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:45,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:27:45,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447051363] [2020-10-12 10:27:45,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:27:45,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:45,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:27:45,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:27:45,562 INFO L87 Difference]: Start difference. First operand 493 states and 649 transitions. Second operand 18 states. [2020-10-12 10:27:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:48,462 INFO L93 Difference]: Finished difference Result 1003 states and 1335 transitions. [2020-10-12 10:27:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 10:27:48,468 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-12 10:27:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:48,473 INFO L225 Difference]: With dead ends: 1003 [2020-10-12 10:27:48,473 INFO L226 Difference]: Without dead ends: 979 [2020-10-12 10:27:48,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=418, Invalid=3004, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 10:27:48,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2020-10-12 10:27:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 687. [2020-10-12 10:27:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2020-10-12 10:27:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 933 transitions. [2020-10-12 10:27:48,661 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 933 transitions. Word has length 70 [2020-10-12 10:27:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:48,661 INFO L479 AbstractCegarLoop]: Abstraction has 687 states and 933 transitions. [2020-10-12 10:27:48,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:27:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 933 transitions. [2020-10-12 10:27:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:27:48,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:48,667 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:48,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:27:48,667 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:48,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1002561402, now seen corresponding path program 15 times [2020-10-12 10:27:48,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:48,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404193076] [2020-10-12 10:27:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:48,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:48,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:48,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:48,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:49,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:49,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:49,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:49,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:49,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:49,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:50,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:50,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:50,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:51,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:52,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:53,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:27:53,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:27:53,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4925 [2020-10-12 10:27:53,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:27:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 10:27:53,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:54,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:54,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:54,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:54,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:54,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:54,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:54,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:54,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:54,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:54,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:54,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:54,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:54,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:54,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:54,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:54,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:27:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:54,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:54,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:54,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:54,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:54,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:54,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:54,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:54,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:27:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:54,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:54,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:54,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:54,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:54,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:54,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:54,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:54,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:54,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:54,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:27:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:54,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:54,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:54,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:54,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:54,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:54,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:54,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:27:54,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404193076] [2020-10-12 10:27:54,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:54,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:27:54,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661455555] [2020-10-12 10:27:54,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:27:54,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:27:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:27:54,609 INFO L87 Difference]: Start difference. First operand 687 states and 933 transitions. Second operand 23 states. [2020-10-12 10:27:56,547 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-12 10:28:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:01,021 INFO L93 Difference]: Finished difference Result 1501 states and 2038 transitions. [2020-10-12 10:28:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 10:28:01,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-10-12 10:28:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:01,029 INFO L225 Difference]: With dead ends: 1501 [2020-10-12 10:28:01,029 INFO L226 Difference]: Without dead ends: 1499 [2020-10-12 10:28:01,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=601, Invalid=5099, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 10:28:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2020-10-12 10:28:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 800. [2020-10-12 10:28:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-10-12 10:28:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1097 transitions. [2020-10-12 10:28:01,254 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1097 transitions. Word has length 70 [2020-10-12 10:28:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:01,254 INFO L479 AbstractCegarLoop]: Abstraction has 800 states and 1097 transitions. [2020-10-12 10:28:01,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:28:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1097 transitions. [2020-10-12 10:28:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 10:28:01,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:01,258 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:01,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:28:01,258 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:01,259 INFO L82 PathProgramCache]: Analyzing trace with hash -327236852, now seen corresponding path program 16 times [2020-10-12 10:28:01,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:01,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805071530] [2020-10-12 10:28:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:01,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:01,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:01,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:01,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:01,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:01,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:01,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:02,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:02,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:02,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:02,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:02,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:03,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:05,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:06,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 10:28:06,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:28:06,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:28:06,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:06,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:28:06,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:06,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 10:28:06,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:06,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:06,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:06,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:06,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:06,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:06,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:06,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:06,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:06,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:06,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:06,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:06,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:06,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:06,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:06,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:28:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:06,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:06,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:06,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:06,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:28:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:06,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:06,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:06,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:06,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:06,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:28:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:28:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:06,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:06,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:28:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:06,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:06,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:06,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:06,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:06,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:28:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:06,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:28:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 25 proven. 67 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:28:06,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805071530] [2020-10-12 10:28:06,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:06,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:28:06,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049601150] [2020-10-12 10:28:06,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:28:06,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:06,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:28:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:28:06,820 INFO L87 Difference]: Start difference. First operand 800 states and 1097 transitions. Second operand 20 states. [2020-10-12 10:28:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:08,484 INFO L93 Difference]: Finished difference Result 1535 states and 2096 transitions. [2020-10-12 10:28:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:28:08,485 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2020-10-12 10:28:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:08,489 INFO L225 Difference]: With dead ends: 1535 [2020-10-12 10:28:08,489 INFO L226 Difference]: Without dead ends: 834 [2020-10-12 10:28:08,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:28:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2020-10-12 10:28:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 548. [2020-10-12 10:28:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2020-10-12 10:28:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 725 transitions. [2020-10-12 10:28:08,629 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 725 transitions. Word has length 73 [2020-10-12 10:28:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:08,630 INFO L479 AbstractCegarLoop]: Abstraction has 548 states and 725 transitions. [2020-10-12 10:28:08,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:28:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 725 transitions. [2020-10-12 10:28:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 10:28:08,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:08,632 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:08,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:28:08,632 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:08,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1031307617, now seen corresponding path program 17 times [2020-10-12 10:28:08,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:08,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261892553] [2020-10-12 10:28:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:08,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:08,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:09,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:09,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:09,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:09,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:09,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:09,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:10,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:11,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:13,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:13,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 10:28:13,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-12 10:28:13,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:28:13,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:13,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:28:13,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:13,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 10:28:13,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:28:14,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:14,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:14,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:14,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:14,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:14,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:14,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:14,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:14,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:14,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:14,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:14,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:14,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:14,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:14,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:14,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:14,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:14,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:14,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:14,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:28:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:14,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:14,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:14,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:14,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:14,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:14,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:14,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:14,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:14,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:14,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:14,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:28:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:14,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:14,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:14,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:14,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:14,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:14,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:14,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:14,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:28:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:14,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:14,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:14,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:14,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:14,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:14,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:14,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:14,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:14,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:14,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:14,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 10:28:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:14,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:14,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:14,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:14,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:14,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:14,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:14,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:14,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 10:28:14,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261892553] [2020-10-12 10:28:14,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:14,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:28:14,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046857009] [2020-10-12 10:28:14,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:28:14,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:28:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:28:14,617 INFO L87 Difference]: Start difference. First operand 548 states and 725 transitions. Second operand 24 states. [2020-10-12 10:28:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:17,245 INFO L93 Difference]: Finished difference Result 666 states and 872 transitions. [2020-10-12 10:28:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:28:17,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-10-12 10:28:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:17,249 INFO L225 Difference]: With dead ends: 666 [2020-10-12 10:28:17,250 INFO L226 Difference]: Without dead ends: 647 [2020-10-12 10:28:17,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=199, Invalid=2153, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:28:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-10-12 10:28:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 592. [2020-10-12 10:28:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-10-12 10:28:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 780 transitions. [2020-10-12 10:28:17,443 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 780 transitions. Word has length 76 [2020-10-12 10:28:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:17,443 INFO L479 AbstractCegarLoop]: Abstraction has 592 states and 780 transitions. [2020-10-12 10:28:17,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:28:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 780 transitions. [2020-10-12 10:28:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 10:28:17,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:17,446 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:17,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:28:17,447 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1068615544, now seen corresponding path program 18 times [2020-10-12 10:28:17,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:17,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81907759] [2020-10-12 10:28:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:17,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:18,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:18,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:18,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:22,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:22,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 10:28:22,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:28:22,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:28:22,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:22,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:28:22,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:22,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 10:28:22,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:23,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:23,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:23,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:23,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:23,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:23,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:23,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 10:28:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:23,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:23,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:23,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:28:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:23,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:28:23,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:28:23,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:23,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 10:28:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:23,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:28:23,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:23,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 25 proven. 85 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 10:28:23,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81907759] [2020-10-12 10:28:23,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:23,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:28:23,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441137948] [2020-10-12 10:28:23,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:28:23,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:23,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:28:23,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:28:23,169 INFO L87 Difference]: Start difference. First operand 592 states and 780 transitions. Second operand 22 states. [2020-10-12 10:28:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:26,769 INFO L93 Difference]: Finished difference Result 1509 states and 2009 transitions. [2020-10-12 10:28:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 10:28:26,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2020-10-12 10:28:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:26,775 INFO L225 Difference]: With dead ends: 1509 [2020-10-12 10:28:26,775 INFO L226 Difference]: Without dead ends: 1416 [2020-10-12 10:28:26,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=452, Invalid=3208, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 10:28:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2020-10-12 10:28:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 833. [2020-10-12 10:28:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 833 states. [2020-10-12 10:28:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1136 transitions. [2020-10-12 10:28:26,954 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1136 transitions. Word has length 76 [2020-10-12 10:28:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:26,954 INFO L479 AbstractCegarLoop]: Abstraction has 833 states and 1136 transitions. [2020-10-12 10:28:26,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:28:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1136 transitions. [2020-10-12 10:28:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:28:26,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:26,957 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:26,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:28:26,957 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:26,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1419235647, now seen corresponding path program 19 times [2020-10-12 10:28:26,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:26,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961287335] [2020-10-12 10:28:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:26,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:26,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:28,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:31,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:31,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 10:28:31,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:28:31,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:28:31,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:28:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 10:28:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:32,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:32,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:32,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:32,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:32,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:32,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:32,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:32,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:32,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:32,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:32,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:32,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:32,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:32,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:32,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:32,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:32,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:32,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:32,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:32,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:32,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:32,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:28:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:32,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:32,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:32,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:32,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:32,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:32,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:32,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:32,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:32,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:32,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:28:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:32,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:32,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:32,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:32,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:32,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:32,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:32,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:32,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:32,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:32,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:32,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:28:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:32,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:32,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:32,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:32,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:32,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:32,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:32,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:28:32,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:28:32,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:32,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:32,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:28:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:32,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:32,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:32,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:32,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:32,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:32,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:32,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:32,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:28:32,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:32,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 10:28:32,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961287335] [2020-10-12 10:28:32,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:32,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:28:32,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094448574] [2020-10-12 10:28:32,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:28:32,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:32,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:28:32,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:28:32,535 INFO L87 Difference]: Start difference. First operand 833 states and 1136 transitions. Second operand 20 states. [2020-10-12 10:28:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:34,863 INFO L93 Difference]: Finished difference Result 1009 states and 1362 transitions. [2020-10-12 10:28:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:28:34,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-10-12 10:28:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:34,869 INFO L225 Difference]: With dead ends: 1009 [2020-10-12 10:28:34,869 INFO L226 Difference]: Without dead ends: 988 [2020-10-12 10:28:34,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:28:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2020-10-12 10:28:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 871. [2020-10-12 10:28:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-10-12 10:28:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1185 transitions. [2020-10-12 10:28:35,149 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1185 transitions. Word has length 79 [2020-10-12 10:28:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:35,149 INFO L479 AbstractCegarLoop]: Abstraction has 871 states and 1185 transitions. [2020-10-12 10:28:35,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:28:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1185 transitions. [2020-10-12 10:28:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:28:35,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:35,153 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:35,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:28:35,153 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:35,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash 767288817, now seen corresponding path program 20 times [2020-10-12 10:28:35,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:35,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014611367] [2020-10-12 10:28:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:35,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:35,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:36,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:37,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:38,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:38,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:38,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:38,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:38,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:38,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:39,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:40,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:40,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:40,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 10:28:40,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 38 [2020-10-12 10:28:40,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 10:28:40,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:40,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:28:40,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:40,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 10:28:40,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:40,631 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 21 [2020-10-12 10:28:40,766 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 21 [2020-10-12 10:28:41,164 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2020-10-12 10:28:41,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:41,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:41,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:41,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:41,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:41,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:41,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:41,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:28:41,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:41,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:41,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:41,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:41,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:41,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:41,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:41,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:41,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:41,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:41,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:28:41,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:28:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:41,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:41,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:41,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:41,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:41,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:41,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:41,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:41,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:41,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:41,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:28:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:41,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:41,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:41,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:41,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:41,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:28:41,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:41,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:41,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:41,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:28:42,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:28:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:42,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:42,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:42,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:42,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:42,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:28:42,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:42,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:42,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:28:42,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:28:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:42,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:42,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:42,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:42,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:42,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:42,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:42,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:42,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:28:42,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:42,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 39 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 10:28:42,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014611367] [2020-10-12 10:28:42,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:42,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:28:42,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185026049] [2020-10-12 10:28:42,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:28:42,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:28:42,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:28:42,091 INFO L87 Difference]: Start difference. First operand 871 states and 1185 transitions. Second operand 25 states. [2020-10-12 10:28:45,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:45,419 INFO L93 Difference]: Finished difference Result 1091 states and 1473 transitions. [2020-10-12 10:28:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:28:45,419 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 79 [2020-10-12 10:28:45,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:45,423 INFO L225 Difference]: With dead ends: 1091 [2020-10-12 10:28:45,424 INFO L226 Difference]: Without dead ends: 1070 [2020-10-12 10:28:45,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=310, Invalid=2552, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:28:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2020-10-12 10:28:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 969. [2020-10-12 10:28:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2020-10-12 10:28:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1317 transitions. [2020-10-12 10:28:45,719 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1317 transitions. Word has length 79 [2020-10-12 10:28:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:45,719 INFO L479 AbstractCegarLoop]: Abstraction has 969 states and 1317 transitions. [2020-10-12 10:28:45,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:28:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1317 transitions. [2020-10-12 10:28:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:28:45,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:45,723 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:45,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:28:45,723 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:45,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1447480531, now seen corresponding path program 21 times [2020-10-12 10:28:45,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:45,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241795173] [2020-10-12 10:28:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:45,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:45,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:45,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:45,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:45,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:45,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:45,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:46,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:47,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:48,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:49,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:49,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:49,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:50,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:50,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 10:28:50,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 37 [2020-10-12 10:28:50,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:28:50,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:50,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:28:50,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:50,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 10:28:50,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:51,078 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2020-10-12 10:28:51,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:51,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:51,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:51,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:51,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:51,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:51,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:51,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:51,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:51,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:51,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:51,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:51,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:51,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:51,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:51,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:51,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:51,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:28:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:51,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:51,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:51,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:51,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:51,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:51,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:51,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:51,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:51,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:51,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:51,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:28:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:51,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:51,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:51,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:51,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:51,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:51,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:51,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:51,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:51,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:51,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:51,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:28:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:51,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:51,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:51,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:51,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:51,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:51,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:51,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:51,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:51,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:51,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:51,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:28:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:51,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:51,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:51,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:51,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:51,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:28:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 38 proven. 63 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 10:28:51,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241795173] [2020-10-12 10:28:51,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:51,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:28:51,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216216655] [2020-10-12 10:28:51,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:28:51,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:51,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:28:51,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:28:51,800 INFO L87 Difference]: Start difference. First operand 969 states and 1317 transitions. Second operand 21 states. [2020-10-12 10:28:52,257 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2020-10-12 10:28:54,719 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-12 10:28:55,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:55,360 INFO L93 Difference]: Finished difference Result 1333 states and 1782 transitions. [2020-10-12 10:28:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:28:55,361 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2020-10-12 10:28:55,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:55,366 INFO L225 Difference]: With dead ends: 1333 [2020-10-12 10:28:55,366 INFO L226 Difference]: Without dead ends: 1284 [2020-10-12 10:28:55,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=287, Invalid=1693, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:28:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2020-10-12 10:28:55,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1074. [2020-10-12 10:28:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1074 states. [2020-10-12 10:28:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1457 transitions. [2020-10-12 10:28:55,600 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1457 transitions. Word has length 79 [2020-10-12 10:28:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:55,600 INFO L479 AbstractCegarLoop]: Abstraction has 1074 states and 1457 transitions. [2020-10-12 10:28:55,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:28:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1457 transitions. [2020-10-12 10:28:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:28:55,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:55,603 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:55,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:28:55,603 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:55,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1042048431, now seen corresponding path program 22 times [2020-10-12 10:28:55,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:55,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282946994] [2020-10-12 10:28:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:55,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:55,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:56,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:57,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:57,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:57,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:57,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:57,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:57,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:58,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:59,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:00,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:00,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:00,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:00,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:00,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:00,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 10:29:00,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 40 [2020-10-12 10:29:00,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:29:00,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:29:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:29:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 10:29:00,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:01,067 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2020-10-12 10:29:01,371 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 21 [2020-10-12 10:29:01,505 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2020-10-12 10:29:01,653 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-12 10:29:01,792 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-12 10:29:02,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:29:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:02,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:02,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:02,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:29:02,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:02,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:02,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:02,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:02,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:02,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:02,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:02,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:29:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:02,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:02,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:02,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:02,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:02,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:02,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:02,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:02,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:02,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:02,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:02,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:29:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:02,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:02,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:02,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:02,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:02,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:29:02,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:29:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:02,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:02,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:29:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:02,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:02,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:02,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:02,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:02,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:29:02,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:02,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:29:02,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:29:02,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:29:02,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:02,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:29:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:02,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:02,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:02,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:02,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:02,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:29:02,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:02,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:29:02,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:29:02,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:29:02,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:02,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:29:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:02,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:29:02,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:29:02,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:29:02,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:29:02,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:29:02,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:29:02,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:29:02,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:29:02,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:29:02,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:29:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 43 proven. 58 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 10:29:02,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282946994] [2020-10-12 10:29:02,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:29:02,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:29:02,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40530483] [2020-10-12 10:29:02,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:29:02,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:29:02,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:29:02,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:29:02,379 INFO L87 Difference]: Start difference. First operand 1074 states and 1457 transitions. Second operand 22 states. [2020-10-12 10:29:04,007 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-12 10:29:04,591 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-12 10:29:05,018 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-12 10:29:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:29:05,795 INFO L93 Difference]: Finished difference Result 1967 states and 2660 transitions. [2020-10-12 10:29:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:29:05,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2020-10-12 10:29:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:29:05,800 INFO L225 Difference]: With dead ends: 1967 [2020-10-12 10:29:05,800 INFO L226 Difference]: Without dead ends: 1344 [2020-10-12 10:29:05,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:29:05,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2020-10-12 10:29:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1194. [2020-10-12 10:29:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2020-10-12 10:29:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1601 transitions. [2020-10-12 10:29:06,033 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1601 transitions. Word has length 79 [2020-10-12 10:29:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:29:06,033 INFO L479 AbstractCegarLoop]: Abstraction has 1194 states and 1601 transitions. [2020-10-12 10:29:06,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:29:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1601 transitions. [2020-10-12 10:29:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:29:06,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:29:06,036 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:29:06,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:29:06,036 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:29:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:29:06,037 INFO L82 PathProgramCache]: Analyzing trace with hash -986537679, now seen corresponding path program 23 times [2020-10-12 10:29:06,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:29:06,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754058175] [2020-10-12 10:29:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:29:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:29:06,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... 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