/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:17:05,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:17:05,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:17:05,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:17:05,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:17:05,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:17:05,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:17:05,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:17:05,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:17:05,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:17:05,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:17:05,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:17:05,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:17:05,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:17:05,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:17:05,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:17:05,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:17:05,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:17:05,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:17:05,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:17:05,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:17:05,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:17:05,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:17:05,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:17:05,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:17:05,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:17:05,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:17:05,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:17:05,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:17:05,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:17:05,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:17:05,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:17:05,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:17:05,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:17:05,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:17:05,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:17:05,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:17:05,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:17:05,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:17:05,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:17:05,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:17:05,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 18:17:05,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:17:05,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:17:05,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:17:05,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:17:05,935 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:17:05,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:17:05,936 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:17:05,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:17:05,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:17:05,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:17:05,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:17:05,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:17:05,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:17:05,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:17:05,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:17:05,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:17:05,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:17:05,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:17:05,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:17:05,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:17:05,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:17:05,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:17:05,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:17:05,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:17:05,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:17:05,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:17:05,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:17:05,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:17:05,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:17:05,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:17:06,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:17:06,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:17:06,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:17:06,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:17:06,302 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:17:06,302 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-10-14 18:17:06,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f4747651/01eb556262b544f8aceb4cfe1a07eaac/FLAGfaabd9d33 [2020-10-14 18:17:06,842 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:17:06,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-10-14 18:17:06,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f4747651/01eb556262b544f8aceb4cfe1a07eaac/FLAGfaabd9d33 [2020-10-14 18:17:07,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f4747651/01eb556262b544f8aceb4cfe1a07eaac [2020-10-14 18:17:07,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:17:07,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:17:07,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:17:07,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:17:07,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:17:07,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:17:07" (1/1) ... [2020-10-14 18:17:07,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0c700e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07, skipping insertion in model container [2020-10-14 18:17:07,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:17:07" (1/1) ... [2020-10-14 18:17:07,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:17:07,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:17:07,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:17:07,503 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:17:07,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:17:07,541 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:17:07,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07 WrapperNode [2020-10-14 18:17:07,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:17:07,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:17:07,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:17:07,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:17:07,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07" (1/1) ... [2020-10-14 18:17:07,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07" (1/1) ... [2020-10-14 18:17:07,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07" (1/1) ... [2020-10-14 18:17:07,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07" (1/1) ... [2020-10-14 18:17:07,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07" (1/1) ... [2020-10-14 18:17:07,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07" (1/1) ... [2020-10-14 18:17:07,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07" (1/1) ... [2020-10-14 18:17:07,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:17:07,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:17:07,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:17:07,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:17:07,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:17:07,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:17:07,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:17:07,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:17:07,780 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-14 18:17:07,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:17:07,780 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:17:07,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:17:07,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:17:07,781 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 18:17:07,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:17:07,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 18:17:07,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:17:07,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:17:07,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 18:17:07,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:17:07,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:17:07,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:17:08,044 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:17:08,045 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 18:17:08,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:17:08 BoogieIcfgContainer [2020-10-14 18:17:08,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:17:08,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:17:08,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:17:08,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:17:08,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:17:07" (1/3) ... [2020-10-14 18:17:08,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63133d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:17:08, skipping insertion in model container [2020-10-14 18:17:08,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:17:07" (2/3) ... [2020-10-14 18:17:08,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63133d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:17:08, skipping insertion in model container [2020-10-14 18:17:08,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:17:08" (3/3) ... [2020-10-14 18:17:08,060 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-10-14 18:17:08,073 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:17:08,083 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:17:08,101 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:17:08,132 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:17:08,133 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:17:08,133 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:17:08,133 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:17:08,134 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:17:08,134 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:17:08,134 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:17:08,134 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:17:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 18:17:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 18:17:08,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:08,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:08,190 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash -850547107, now seen corresponding path program 1 times [2020-10-14 18:17:08,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:08,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426306615] [2020-10-14 18:17:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:08,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:08,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:08,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 18:17:08,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:08,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-14 18:17:08,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:08,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:08,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:17:08,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:08,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 18:17:08,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:17:08,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:08,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:08,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:08,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:08,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:08,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:17:08,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:08,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:08,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:08,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:08,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:08,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:08,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:08,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:08,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 18:17:08,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:08,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:17:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:08,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:08,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:08,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426306615] [2020-10-14 18:17:08,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:17:08,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 18:17:08,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786381343] [2020-10-14 18:17:08,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:17:08,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:08,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:17:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:17:08,828 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-10-14 18:17:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:09,033 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-14 18:17:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:17:09,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 18:17:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:09,044 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:17:09,045 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 18:17:09,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:17:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 18:17:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 18:17:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:17:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 18:17:09,093 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-14 18:17:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:09,094 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 18:17:09,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:17:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 18:17:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 18:17:09,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:09,096 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] [2020-10-14 18:17:09,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:17:09,097 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:09,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:09,097 INFO L82 PathProgramCache]: Analyzing trace with hash -169907062, now seen corresponding path program 1 times [2020-10-14 18:17:09,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:09,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092062506] [2020-10-14 18:17:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:09,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:09,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 18:17:09,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:09,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-14 18:17:09,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:09,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:17:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:09,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:09,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:09,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:09,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:09,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:09,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:17:09,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:09,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:09,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:09,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:09,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:09,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:09,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:09,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:09,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 18:17:09,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:09,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-14 18:17:09,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:09,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:09,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:17:09,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:09,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:17:09,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:09,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092062506] [2020-10-14 18:17:09,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:09,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:17:09,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120294029] [2020-10-14 18:17:09,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:17:09,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:09,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:17:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:17:09,692 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-10-14 18:17:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:09,860 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-14 18:17:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:17:09,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 18:17:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:09,862 INFO L225 Difference]: With dead ends: 50 [2020-10-14 18:17:09,862 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 18:17:09,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:17:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 18:17:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 18:17:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 18:17:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 18:17:09,872 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-10-14 18:17:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:09,872 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 18:17:09,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:17:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 18:17:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 18:17:09,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:09,874 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] [2020-10-14 18:17:09,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:17:09,874 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:09,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1071501364, now seen corresponding path program 2 times [2020-10-14 18:17:09,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:09,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708553203] [2020-10-14 18:17:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:09,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:10,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 18:17:10,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:10,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-14 18:17:10,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:10,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:10,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:17:10,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:10,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:17:10,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:10,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:10,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:10,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:10,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:10,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:10,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:10,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:10,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:10,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:10,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 18:17:10,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:10,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-14 18:17:10,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:10,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:17:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:10,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:17:10,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:10,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708553203] [2020-10-14 18:17:10,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:10,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:17:10,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520836353] [2020-10-14 18:17:10,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:17:10,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:10,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:17:10,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:17:10,219 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-10-14 18:17:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:10,377 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-14 18:17:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:17:10,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 18:17:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:10,379 INFO L225 Difference]: With dead ends: 52 [2020-10-14 18:17:10,379 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 18:17:10,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:17:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 18:17:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 18:17:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 18:17:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-14 18:17:10,386 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-14 18:17:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:10,387 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-14 18:17:10,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:17:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-14 18:17:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:17:10,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:10,388 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:10,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:17:10,389 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:10,389 INFO L82 PathProgramCache]: Analyzing trace with hash 79768206, now seen corresponding path program 3 times [2020-10-14 18:17:10,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:10,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205664806] [2020-10-14 18:17:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:10,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:17:10,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:10,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-14 18:17:10,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:10,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:17:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:17:10,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:10,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:10,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:10,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:10,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:10,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:10,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:10,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:10,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:10,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:10,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:10,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:10,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 18:17:10,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:10,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-14 18:17:10,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:10,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:17:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:17:10,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:10,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205664806] [2020-10-14 18:17:10,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:10,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:17:10,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487952795] [2020-10-14 18:17:10,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:17:10,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:17:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:17:10,794 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-10-14 18:17:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:10,948 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-14 18:17:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:17:10,948 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 18:17:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:10,950 INFO L225 Difference]: With dead ends: 54 [2020-10-14 18:17:10,950 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 18:17:10,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:17:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 18:17:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 18:17:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 18:17:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-14 18:17:10,957 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-10-14 18:17:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:10,957 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-14 18:17:10,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:17:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-14 18:17:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:17:10,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:10,959 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:10,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:17:10,959 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1651737392, now seen corresponding path program 4 times [2020-10-14 18:17:10,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:10,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174253359] [2020-10-14 18:17:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:11,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:17:11,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:11,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-14 18:17:11,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:11,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:11,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:17:11,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:11,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:17:11,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:11,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:11,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:11,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:11,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:11,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:11,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:11,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:11,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:11,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:11,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:11,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:11,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:11,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-14 18:17:11,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:11,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-14 18:17:11,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:11,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:17:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:17:11,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:11,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174253359] [2020-10-14 18:17:11,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:11,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:17:11,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906626930] [2020-10-14 18:17:11,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:17:11,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:11,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:17:11,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:17:11,440 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-10-14 18:17:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:11,599 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-14 18:17:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:17:11,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 18:17:11,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:11,601 INFO L225 Difference]: With dead ends: 56 [2020-10-14 18:17:11,601 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 18:17:11,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:17:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 18:17:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 18:17:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:17:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-14 18:17:11,608 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-10-14 18:17:11,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:11,608 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-14 18:17:11,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:17:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-14 18:17:11,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 18:17:11,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:11,609 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:11,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:17:11,610 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:11,610 INFO L82 PathProgramCache]: Analyzing trace with hash 818693778, now seen corresponding path program 5 times [2020-10-14 18:17:11,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:11,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238005047] [2020-10-14 18:17:11,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:11,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:12,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:17:12,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:12,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-14 18:17:12,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:12,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:17:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:17:12,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:12,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:12,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:12,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:12,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:12,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:12,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:12,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:12,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:12,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:12,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:12,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:12,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:12,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 18:17:12,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:12,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-14 18:17:12,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:12,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:12,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:17:12,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:12,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:17:12,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:12,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238005047] [2020-10-14 18:17:12,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:12,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:17:12,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435084880] [2020-10-14 18:17:12,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:17:12,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:12,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:17:12,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:17:12,224 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-14 18:17:12,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:12,400 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-14 18:17:12,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:17:12,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 18:17:12,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:12,402 INFO L225 Difference]: With dead ends: 58 [2020-10-14 18:17:12,402 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:17:12,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:17:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:17:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 18:17:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 18:17:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-14 18:17:12,409 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-10-14 18:17:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:12,410 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-14 18:17:12,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:17:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-14 18:17:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:17:12,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:12,412 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:12,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:17:12,412 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash -213866540, now seen corresponding path program 6 times [2020-10-14 18:17:12,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:12,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493020643] [2020-10-14 18:17:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:12,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:12,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 18:17:12,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:12,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-14 18:17:12,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:12,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:12,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:17:12,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:12,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:17:12,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:12,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:12,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:12,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:12,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:12,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:12,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:12,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:12,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:12,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:12,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:12,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:12,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:12,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:12,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 18:17:12,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:12,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-14 18:17:12,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:12,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:12,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:17:12,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:12,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:17:12,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:13,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493020643] [2020-10-14 18:17:13,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:13,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:17:13,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102109839] [2020-10-14 18:17:13,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:17:13,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:13,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:17:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:17:13,070 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-10-14 18:17:13,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:13,278 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-14 18:17:13,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:17:13,279 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 18:17:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:13,280 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:17:13,280 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:17:13,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:17:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:17:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 18:17:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:17:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-14 18:17:13,287 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-10-14 18:17:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:13,287 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-14 18:17:13,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:17:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-14 18:17:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:17:13,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:13,289 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:13,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:17:13,289 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash -366886762, now seen corresponding path program 7 times [2020-10-14 18:17:13,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:13,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066727801] [2020-10-14 18:17:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:13,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:13,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:14,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:14,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:17:14,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:14,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-14 18:17:14,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:14,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:17:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:17:14,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:14,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:14,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:14,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:14,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:14,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:14,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:14,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:14,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:14,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:14,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:14,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:14,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:14,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:14,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:14,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:14,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 18:17:14,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:14,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-14 18:17:14,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:14,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:17:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:17:14,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:14,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066727801] [2020-10-14 18:17:14,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:14,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:17:14,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607421896] [2020-10-14 18:17:14,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:17:14,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:14,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:17:14,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:17:14,466 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-10-14 18:17:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:14,634 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-14 18:17:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:17:14,635 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 18:17:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:14,636 INFO L225 Difference]: With dead ends: 62 [2020-10-14 18:17:14,636 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 18:17:14,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:17:14,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 18:17:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 18:17:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 18:17:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-14 18:17:14,643 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-10-14 18:17:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:14,643 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-14 18:17:14,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:17:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-14 18:17:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:17:14,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:14,644 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:14,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:17:14,645 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1390432040, now seen corresponding path program 8 times [2020-10-14 18:17:14,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:14,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993095554] [2020-10-14 18:17:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:14,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:14,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:15,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:15,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:17:15,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:15,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-14 18:17:15,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:15,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:15,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:17:15,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:15,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:17:15,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:15,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:15,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:15,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:15,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:15,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:15,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:15,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:15,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:15,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:15,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:15,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:15,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:15,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:15,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:15,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:15,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:17:15,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:15,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-14 18:17:15,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:15,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:17:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:15,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:17:15,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:15,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993095554] [2020-10-14 18:17:15,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:15,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:17:15,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794168838] [2020-10-14 18:17:15,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:17:15,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:17:15,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:17:15,940 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-10-14 18:17:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:16,185 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-14 18:17:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:17:16,186 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 18:17:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:16,187 INFO L225 Difference]: With dead ends: 64 [2020-10-14 18:17:16,187 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 18:17:16,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:17:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 18:17:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 18:17:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 18:17:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-14 18:17:16,195 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-14 18:17:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:16,196 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-14 18:17:16,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:17:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-14 18:17:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:17:16,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:16,197 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:16,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:17:16,198 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1469933414, now seen corresponding path program 9 times [2020-10-14 18:17:16,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:16,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704479743] [2020-10-14 18:17:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:16,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:16,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:16,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 18:17:16,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:16,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-14 18:17:16,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:16,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:17:16,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:16,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:17:16,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:16,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:16,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:17,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:17,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:17,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:17,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:17,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:17,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:17,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:17,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:17,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:17,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 18:17:17,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:17,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-14 18:17:17,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:17,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:17:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:17:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:17,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704479743] [2020-10-14 18:17:17,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:17,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:17:17,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547907300] [2020-10-14 18:17:17,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:17:17,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:17:17,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:17:17,868 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 15 states. [2020-10-14 18:17:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:18,181 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-14 18:17:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:17:18,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-14 18:17:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:18,183 INFO L225 Difference]: With dead ends: 66 [2020-10-14 18:17:18,183 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 18:17:18,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:17:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 18:17:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 18:17:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:17:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-14 18:17:18,189 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-14 18:17:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:18,190 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-14 18:17:18,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:17:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-14 18:17:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 18:17:18,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:18,191 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:18,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:17:18,191 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:18,192 INFO L82 PathProgramCache]: Analyzing trace with hash -561342500, now seen corresponding path program 10 times [2020-10-14 18:17:18,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:18,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031542471] [2020-10-14 18:17:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:18,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:18,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:19,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:19,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 18:17:19,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-14 18:17:19,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:19,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:17:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:19,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:17:19,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:19,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:19,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:19,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:19,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:19,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:19,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:19,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:19,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:19,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:19,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:19,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:19,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:19,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:19,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:19,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:19,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 18:17:19,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:19,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-14 18:17:19,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:19,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:19,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:17:19,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:19,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:17:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:20,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031542471] [2020-10-14 18:17:20,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:20,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:17:20,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174146232] [2020-10-14 18:17:20,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:17:20,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:20,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:17:20,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:17:20,351 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 16 states. [2020-10-14 18:17:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:20,598 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-14 18:17:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:17:20,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 18:17:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:20,600 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:17:20,600 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 18:17:20,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:17:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 18:17:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 18:17:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 18:17:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-14 18:17:20,614 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-14 18:17:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:20,615 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-14 18:17:20,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:17:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-14 18:17:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:17:20,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:20,617 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:20,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:17:20,617 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash 716164766, now seen corresponding path program 11 times [2020-10-14 18:17:20,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:20,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060302534] [2020-10-14 18:17:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:20,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:21,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:21,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:17:21,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:21,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-14 18:17:21,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:21,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:21,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:17:21,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:21,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:17:21,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:17:21,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:21,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:21,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:21,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:21,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:21,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:21,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:21,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:21,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:21,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:21,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:17:21,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:22,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:17:22,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:22,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-14 18:17:22,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:22,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:17:22,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:22,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:17:22,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:22,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060302534] [2020-10-14 18:17:22,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:22,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:17:22,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924328316] [2020-10-14 18:17:22,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:17:22,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:17:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:17:22,439 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 17 states. [2020-10-14 18:17:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:22,665 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-14 18:17:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:17:22,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-14 18:17:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:22,666 INFO L225 Difference]: With dead ends: 70 [2020-10-14 18:17:22,667 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 18:17:22,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:17:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 18:17:22,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 18:17:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 18:17:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-14 18:17:22,681 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-14 18:17:22,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:22,682 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-14 18:17:22,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:17:22,682 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-14 18:17:22,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:17:22,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:22,683 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:22,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:17:22,684 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:22,684 INFO L82 PathProgramCache]: Analyzing trace with hash 40000736, now seen corresponding path program 12 times [2020-10-14 18:17:22,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:22,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235363973] [2020-10-14 18:17:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:22,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:23,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:23,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:17:23,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:23,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 949 [2020-10-14 18:17:23,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:23,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:17:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:17:23,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:23,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:23,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:23,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:23,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:23,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:23,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:23,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:23,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:23,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:23,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:23,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:23,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:23,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:23,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:24,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:24,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 18:17:24,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:24,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-14 18:17:24,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:24,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:24,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:17:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:17:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:24,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235363973] [2020-10-14 18:17:24,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:24,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:17:24,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894379656] [2020-10-14 18:17:24,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:17:24,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:24,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:17:24,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:17:24,559 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 18 states. [2020-10-14 18:17:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:24,812 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-14 18:17:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:17:24,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-14 18:17:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:24,814 INFO L225 Difference]: With dead ends: 72 [2020-10-14 18:17:24,814 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 18:17:24,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:17:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 18:17:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 18:17:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:17:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-14 18:17:24,828 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 44 [2020-10-14 18:17:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:24,833 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-14 18:17:24,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:17:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-14 18:17:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:17:24,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:24,834 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:24,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:17:24,835 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:24,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1213570398, now seen corresponding path program 13 times [2020-10-14 18:17:24,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:24,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801773961] [2020-10-14 18:17:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:24,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:24,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:26,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:26,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 18:17:26,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:26,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1217 [2020-10-14 18:17:26,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:26,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:26,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:17:26,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:26,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:17:26,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:26,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:26,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:26,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:26,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:26,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:26,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:26,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:26,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:26,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:17:26,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:26,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:26,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:26,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 18:17:26,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:26,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-14 18:17:26,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:26,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:17:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:17:26,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:26,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801773961] [2020-10-14 18:17:26,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:26,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:17:26,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272653967] [2020-10-14 18:17:26,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:17:26,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:26,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:17:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:17:26,843 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 19 states. [2020-10-14 18:17:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:27,127 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-14 18:17:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:17:27,127 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 18:17:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:27,128 INFO L225 Difference]: With dead ends: 74 [2020-10-14 18:17:27,128 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:17:27,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:17:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:17:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 18:17:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:17:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-14 18:17:27,137 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 46 [2020-10-14 18:17:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:27,138 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-14 18:17:27,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:17:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-14 18:17:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:17:27,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:27,139 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:27,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:17:27,140 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:27,140 INFO L82 PathProgramCache]: Analyzing trace with hash 990380004, now seen corresponding path program 14 times [2020-10-14 18:17:27,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:27,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094949293] [2020-10-14 18:17:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:27,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:28,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:28,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:17:28,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:28,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-10-14 18:17:28,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:28,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:28,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:17:28,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:28,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:17:28,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:28,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:28,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:28,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:28,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:28,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:28,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:28,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:28,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:28,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:28,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:28,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:28,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:28,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:17:28,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:28,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-14 18:17:28,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:28,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:17:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:17:28,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:29,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094949293] [2020-10-14 18:17:29,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:29,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:17:29,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165405800] [2020-10-14 18:17:29,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:17:29,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:17:29,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:17:29,094 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 20 states. [2020-10-14 18:17:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:29,327 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-14 18:17:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:17:29,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-14 18:17:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:29,329 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:17:29,329 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 18:17:29,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:17:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 18:17:29,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-14 18:17:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 18:17:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-14 18:17:29,335 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2020-10-14 18:17:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:29,336 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-14 18:17:29,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:17:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-14 18:17:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 18:17:29,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:29,337 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:29,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:17:29,337 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1567839398, now seen corresponding path program 15 times [2020-10-14 18:17:29,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:29,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993254776] [2020-10-14 18:17:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:29,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:29,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:30,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:30,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 18:17:30,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:30,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-14 18:17:30,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:30,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:17:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:17:30,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:30,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:30,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:30,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:30,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:30,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:30,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:30,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:30,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:30,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:30,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:30,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:30,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:30,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:31,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:31,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:17:31,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:31,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-14 18:17:31,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:31,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:31,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:17:31,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:31,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:17:31,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:31,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993254776] [2020-10-14 18:17:31,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:31,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:17:31,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6659010] [2020-10-14 18:17:31,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:17:31,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:17:31,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:17:31,305 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 21 states. [2020-10-14 18:17:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:31,553 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-14 18:17:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:17:31,554 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-14 18:17:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:31,555 INFO L225 Difference]: With dead ends: 78 [2020-10-14 18:17:31,555 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 18:17:31,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:17:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 18:17:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 18:17:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:17:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-14 18:17:31,562 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-10-14 18:17:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:31,562 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-14 18:17:31,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:17:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-14 18:17:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 18:17:31,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:31,563 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:31,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:17:31,564 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:31,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1839431448, now seen corresponding path program 16 times [2020-10-14 18:17:31,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:31,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688100729] [2020-10-14 18:17:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:32,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:32,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 18:17:32,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:32,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-14 18:17:32,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:32,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:32,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:17:32,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:32,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:17:32,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:32,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:32,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:32,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:32,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:32,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:32,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:32,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:32,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:32,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:32,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:32,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:32,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:32,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:32,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:33,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:33,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:17:33,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:33,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-14 18:17:33,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:33,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:17:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:17:33,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:33,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688100729] [2020-10-14 18:17:33,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:33,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:17:33,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956224343] [2020-10-14 18:17:33,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:17:33,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:17:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:17:33,693 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 22 states. [2020-10-14 18:17:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:33,986 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-14 18:17:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:17:33,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 18:17:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:33,988 INFO L225 Difference]: With dead ends: 80 [2020-10-14 18:17:33,988 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 18:17:33,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:17:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 18:17:33,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 18:17:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 18:17:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-14 18:17:33,995 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-14 18:17:33,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:33,995 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-14 18:17:33,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:17:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-14 18:17:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:17:33,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:33,996 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:33,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:17:33,996 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:33,997 INFO L82 PathProgramCache]: Analyzing trace with hash 833332394, now seen corresponding path program 17 times [2020-10-14 18:17:33,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:33,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871119356] [2020-10-14 18:17:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:34,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:35,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:35,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:17:35,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:35,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-10-14 18:17:35,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:35,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:17:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:17:35,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:35,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:35,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:35,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:35,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:35,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:35,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:35,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:35,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:35,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:35,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:35,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:35,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:35,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:36,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:36,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:17:36,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:36,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-14 18:17:36,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:36,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:36,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:17:36,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:36,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:17:36,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:36,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871119356] [2020-10-14 18:17:36,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:36,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:17:36,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453917356] [2020-10-14 18:17:36,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:17:36,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:17:36,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:17:36,361 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 23 states. [2020-10-14 18:17:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:36,579 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-14 18:17:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:17:36,580 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-14 18:17:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:36,581 INFO L225 Difference]: With dead ends: 82 [2020-10-14 18:17:36,581 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:17:36,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:17:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:17:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-14 18:17:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 18:17:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-14 18:17:36,587 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 54 [2020-10-14 18:17:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:36,587 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-14 18:17:36,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:17:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-14 18:17:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:17:36,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:36,588 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:36,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:17:36,588 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:36,589 INFO L82 PathProgramCache]: Analyzing trace with hash 968941548, now seen corresponding path program 18 times [2020-10-14 18:17:36,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:36,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080588477] [2020-10-14 18:17:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:36,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:36,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:38,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:38,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 18:17:38,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:38,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1477 [2020-10-14 18:17:38,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:38,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:38,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:17:38,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:17:38,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:38,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:38,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:38,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:38,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:38,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:38,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:38,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:38,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:38,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:38,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:38,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:38,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:38,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:38,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:38,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:38,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 18:17:38,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:38,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-14 18:17:38,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:38,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:17:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:17:38,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:38,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080588477] [2020-10-14 18:17:38,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:38,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:17:38,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766349693] [2020-10-14 18:17:38,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:17:38,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:38,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:17:38,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:17:38,931 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 24 states. [2020-10-14 18:17:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:39,228 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-14 18:17:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:17:39,229 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-14 18:17:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:39,230 INFO L225 Difference]: With dead ends: 84 [2020-10-14 18:17:39,230 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 18:17:39,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:17:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 18:17:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 18:17:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:17:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-14 18:17:39,236 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 56 [2020-10-14 18:17:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:39,237 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-14 18:17:39,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:17:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-14 18:17:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 18:17:39,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:39,237 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:39,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:17:39,238 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:39,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1854647634, now seen corresponding path program 19 times [2020-10-14 18:17:39,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:39,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144891370] [2020-10-14 18:17:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:39,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:39,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:40,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:40,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 18:17:40,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:40,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-14 18:17:40,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:40,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:17:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:17:40,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:40,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:40,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:40,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:40,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:40,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:40,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:40,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:40,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:40,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:40,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:40,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:40,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:40,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:40,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:40,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:40,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 18:17:40,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:40,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-14 18:17:40,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:40,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:40,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:17:40,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:40,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:17:40,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:41,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144891370] [2020-10-14 18:17:41,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:41,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:17:41,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173226049] [2020-10-14 18:17:41,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:17:41,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:41,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:17:41,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:17:41,241 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 25 states. [2020-10-14 18:17:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:41,587 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-14 18:17:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:17:41,587 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 18:17:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:41,588 INFO L225 Difference]: With dead ends: 86 [2020-10-14 18:17:41,588 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 18:17:41,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:17:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 18:17:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-14 18:17:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 18:17:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-14 18:17:41,602 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2020-10-14 18:17:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:41,602 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-14 18:17:41,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:17:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-14 18:17:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:17:41,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:41,603 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:41,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:17:41,606 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:41,606 INFO L82 PathProgramCache]: Analyzing trace with hash -904520464, now seen corresponding path program 20 times [2020-10-14 18:17:41,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:41,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012416577] [2020-10-14 18:17:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:41,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:42,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:42,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:17:42,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:42,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-14 18:17:42,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:42,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:42,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:17:42,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:42,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:17:42,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:42,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:42,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:42,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:42,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:42,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:42,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:42,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:42,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:42,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:42,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:42,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:42,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:42,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:42,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:43,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:43,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:17:43,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:43,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-14 18:17:43,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:43,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:43,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:17:43,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:43,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:17:43,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:43,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012416577] [2020-10-14 18:17:43,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:43,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:17:43,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200994508] [2020-10-14 18:17:43,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:17:43,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:43,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:17:43,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:17:43,678 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 26 states. [2020-10-14 18:17:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:43,932 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-14 18:17:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:17:43,932 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-14 18:17:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:43,933 INFO L225 Difference]: With dead ends: 88 [2020-10-14 18:17:43,933 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:17:43,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:17:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:17:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 18:17:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 18:17:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-14 18:17:43,944 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 60 [2020-10-14 18:17:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:43,945 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-14 18:17:43,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:17:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-14 18:17:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 18:17:43,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:43,946 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:43,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:17:43,946 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:43,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1634623154, now seen corresponding path program 21 times [2020-10-14 18:17:43,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:43,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059897727] [2020-10-14 18:17:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:43,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:43,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:45,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:45,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 18:17:45,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:45,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-14 18:17:45,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:45,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:17:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:17:45,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:45,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:45,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:45,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:45,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:45,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:45,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:45,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:45,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:45,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:45,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:45,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:45,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:45,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:45,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:45,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:45,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:17:45,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-14 18:17:45,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:45,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:17:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:17:45,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:46,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059897727] [2020-10-14 18:17:46,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:46,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:17:46,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776147751] [2020-10-14 18:17:46,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:17:46,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:46,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:17:46,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:17:46,318 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 27 states. [2020-10-14 18:17:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:46,663 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-14 18:17:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:17:46,666 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 18:17:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:46,667 INFO L225 Difference]: With dead ends: 90 [2020-10-14 18:17:46,668 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 18:17:46,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:17:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 18:17:46,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-14 18:17:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 18:17:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-14 18:17:46,673 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-14 18:17:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:46,673 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-14 18:17:46,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:17:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-14 18:17:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 18:17:46,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:46,674 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:46,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:17:46,674 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:46,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2084751372, now seen corresponding path program 22 times [2020-10-14 18:17:46,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:46,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777642736] [2020-10-14 18:17:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:46,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:46,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:48,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:48,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 18:17:48,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:48,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1745 [2020-10-14 18:17:48,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:48,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:48,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:17:48,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:48,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:17:48,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:48,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:48,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:48,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:48,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:48,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:48,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:48,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:48,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:48,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:48,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:48,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:49,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:49,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:17:49,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:49,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-14 18:17:49,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:49,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:49,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:17:49,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:49,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:17:49,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:49,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777642736] [2020-10-14 18:17:49,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:49,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:17:49,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942858001] [2020-10-14 18:17:49,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:17:49,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:49,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:17:49,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:17:49,482 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 28 states. [2020-10-14 18:17:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:49,839 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-14 18:17:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:17:49,839 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-14 18:17:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:49,841 INFO L225 Difference]: With dead ends: 92 [2020-10-14 18:17:49,841 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 18:17:49,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=588, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:17:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 18:17:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-14 18:17:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 18:17:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-14 18:17:49,847 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 64 [2020-10-14 18:17:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:49,847 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-14 18:17:49,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:17:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-14 18:17:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:17:49,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:49,848 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:49,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:17:49,849 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1304086710, now seen corresponding path program 23 times [2020-10-14 18:17:49,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:49,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832787335] [2020-10-14 18:17:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:51,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:51,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:17:51,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:51,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-10-14 18:17:51,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:51,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:51,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:17:51,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:51,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:17:51,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:51,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:51,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:51,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:51,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:51,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:51,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:51,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:51,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:51,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:51,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:51,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:52,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:52,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:17:52,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:52,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-14 18:17:52,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:52,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:52,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:17:52,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:52,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:17:52,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:52,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832787335] [2020-10-14 18:17:52,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:52,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:17:52,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953563013] [2020-10-14 18:17:52,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:17:52,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:17:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:17:52,700 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 29 states. [2020-10-14 18:17:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:53,068 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-14 18:17:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:17:53,068 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-14 18:17:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:53,070 INFO L225 Difference]: With dead ends: 94 [2020-10-14 18:17:53,070 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 18:17:53,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=624, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:17:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 18:17:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-14 18:17:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 18:17:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-14 18:17:53,076 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 66 [2020-10-14 18:17:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:53,076 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-14 18:17:53,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:17:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-14 18:17:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 18:17:53,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:53,077 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:53,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:17:53,077 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1902694152, now seen corresponding path program 24 times [2020-10-14 18:17:53,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:53,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164649840] [2020-10-14 18:17:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:53,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:53,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:55,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:55,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 18:17:55,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:55,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2202 [2020-10-14 18:17:55,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:55,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:55,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:17:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:17:55,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:55,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:55,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:55,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:55,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:55,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:55,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:55,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:55,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:55,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:55,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:56,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:56,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 18:17:56,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:56,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-14 18:17:56,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:56,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:17:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:56,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:17:56,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:56,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164649840] [2020-10-14 18:17:56,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:56,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:17:56,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151335503] [2020-10-14 18:17:56,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:17:56,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:56,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:17:56,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:17:56,598 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 30 states. [2020-10-14 18:17:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:56,967 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-14 18:17:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:17:56,968 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-14 18:17:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:56,969 INFO L225 Difference]: With dead ends: 96 [2020-10-14 18:17:56,969 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 18:17:56,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:17:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 18:17:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-14 18:17:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:17:56,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-14 18:17:56,976 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2020-10-14 18:17:56,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:56,976 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-14 18:17:56,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:17:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-14 18:17:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 18:17:56,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:56,977 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:56,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:17:56,978 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash 167415994, now seen corresponding path program 25 times [2020-10-14 18:17:56,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:56,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278640744] [2020-10-14 18:17:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:57,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:57,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:58,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:58,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 18:17:58,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:58,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1705 [2020-10-14 18:17:58,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:58,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:17:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:17:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:17:58,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:58,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:58,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:58,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:58,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:58,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:58,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:17:58,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:58,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:58,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:58,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:58,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:58,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:58,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:17:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:58,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:59,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:59,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 18:17:59,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:59,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-14 18:17:59,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:59,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:59,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:17:59,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:59,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:17:59,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:00,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278640744] [2020-10-14 18:18:00,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:00,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:18:00,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654373807] [2020-10-14 18:18:00,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:18:00,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:00,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:18:00,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:18:00,103 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 31 states. [2020-10-14 18:18:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:00,419 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-14 18:18:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:18:00,420 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-14 18:18:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:00,421 INFO L225 Difference]: With dead ends: 98 [2020-10-14 18:18:00,421 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 18:18:00,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=699, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:18:00,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 18:18:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-14 18:18:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 18:18:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-14 18:18:00,430 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 70 [2020-10-14 18:18:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:00,432 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-14 18:18:00,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:18:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-14 18:18:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:18:00,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:00,434 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:00,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:18:00,434 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash 973408252, now seen corresponding path program 26 times [2020-10-14 18:18:00,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:00,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295880413] [2020-10-14 18:18:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:00,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:00,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:02,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:02,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:18:02,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:02,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2353 [2020-10-14 18:18:02,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:02,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:18:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:18:02,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:02,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:02,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:02,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:02,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:02,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:02,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:02,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:02,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:02,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:02,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:03,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:03,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:18:03,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:03,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-10-14 18:18:03,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:03,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:03,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:18:03,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:03,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:18:03,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:04,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295880413] [2020-10-14 18:18:04,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:04,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:18:04,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288049314] [2020-10-14 18:18:04,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:18:04,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:04,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:18:04,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:18:04,258 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 32 states. [2020-10-14 18:18:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:04,713 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-14 18:18:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:18:04,713 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-14 18:18:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:04,714 INFO L225 Difference]: With dead ends: 100 [2020-10-14 18:18:04,714 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 18:18:04,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=452, Invalid=738, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:18:04,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 18:18:04,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-14 18:18:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 18:18:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-14 18:18:04,723 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 72 [2020-10-14 18:18:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:04,723 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-14 18:18:04,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:18:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-14 18:18:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:18:04,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:04,728 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:04,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:18:04,729 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:04,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1857112386, now seen corresponding path program 27 times [2020-10-14 18:18:04,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:04,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957838025] [2020-10-14 18:18:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:04,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:04,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:07,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:07,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 18:18:07,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:07,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2401 [2020-10-14 18:18:07,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:07,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:18:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:07,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:18:07,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:07,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:07,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:07,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:07,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:07,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:07,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:18:07,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:07,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:07,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:07,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:07,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:08,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:08,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 18:18:08,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:08,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-14 18:18:08,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:08,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:08,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:18:08,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:08,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 18:18:08,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:09,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957838025] [2020-10-14 18:18:09,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:09,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:18:09,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238142984] [2020-10-14 18:18:09,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:18:09,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:18:09,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:18:09,600 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 33 states. [2020-10-14 18:18:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:09,993 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-10-14 18:18:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:18:09,995 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-14 18:18:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:09,996 INFO L225 Difference]: With dead ends: 102 [2020-10-14 18:18:09,996 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 18:18:09,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:18:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 18:18:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-14 18:18:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 18:18:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-14 18:18:10,004 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-10-14 18:18:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:10,004 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-14 18:18:10,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:18:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-14 18:18:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:18:10,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:10,005 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:10,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:18:10,005 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:10,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1021820160, now seen corresponding path program 28 times [2020-10-14 18:18:10,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:10,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907523234] [2020-10-14 18:18:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:10,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:12,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:12,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 18:18:12,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:12,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2790 [2020-10-14 18:18:12,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:12,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:12,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:18:12,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:12,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 18:18:12,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:12,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:12,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:12,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:12,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:12,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:12,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:12,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:12,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:12,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:12,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:12,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:12,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:12,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:13,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:13,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:18:13,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:13,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-14 18:18:13,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:13,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:18:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:18:13,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:14,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907523234] [2020-10-14 18:18:14,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:14,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 18:18:14,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693650892] [2020-10-14 18:18:14,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 18:18:14,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:14,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 18:18:14,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:18:14,549 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 34 states. [2020-10-14 18:18:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:14,847 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-10-14 18:18:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:18:14,848 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-14 18:18:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:14,848 INFO L225 Difference]: With dead ends: 104 [2020-10-14 18:18:14,849 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 18:18:14,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:18:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 18:18:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-14 18:18:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 18:18:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-14 18:18:14,861 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2020-10-14 18:18:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:14,862 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-14 18:18:14,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 18:18:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-14 18:18:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:18:14,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:14,863 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:14,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:18:14,863 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1717058242, now seen corresponding path program 29 times [2020-10-14 18:18:14,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:14,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093408059] [2020-10-14 18:18:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:14,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:14,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:17,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:17,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:18:17,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:17,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2927 [2020-10-14 18:18:17,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:17,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:17,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:18:17,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:17,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:18:17,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:17,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:17,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:17,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:17,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:17,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:17,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:17,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:17,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:17,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:17,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:17,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:17,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:17,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:18,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:18,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:18:18,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:18,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-14 18:18:18,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:18,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:18:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:18:18,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:20,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093408059] [2020-10-14 18:18:20,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:20,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 18:18:20,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184861262] [2020-10-14 18:18:20,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 18:18:20,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:20,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 18:18:20,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:18:20,473 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 35 states. [2020-10-14 18:18:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:20,784 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-14 18:18:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:18:20,785 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-14 18:18:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:20,786 INFO L225 Difference]: With dead ends: 106 [2020-10-14 18:18:20,786 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 18:18:20,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=574, Invalid=832, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:18:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 18:18:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 18:18:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 18:18:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-14 18:18:20,792 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 78 [2020-10-14 18:18:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:20,793 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-14 18:18:20,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 18:18:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-14 18:18:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 18:18:20,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:20,794 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:20,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:18:20,794 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:20,795 INFO L82 PathProgramCache]: Analyzing trace with hash -174043132, now seen corresponding path program 30 times [2020-10-14 18:18:20,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:20,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225040044] [2020-10-14 18:18:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:20,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:23,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:23,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 18:18:23,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:23,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2946 [2020-10-14 18:18:23,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:23,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:23,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:18:23,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:23,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:18:23,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:23,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:23,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:23,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:23,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:23,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:23,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:23,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:23,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:23,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:23,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:23,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:23,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:23,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:23,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:25,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:25,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:18:25,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:25,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-14 18:18:25,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:25,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:25,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:18:25,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:25,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:18:25,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:25,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225040044] [2020-10-14 18:18:25,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:25,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:18:25,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067953571] [2020-10-14 18:18:25,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:18:25,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:18:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:18:25,843 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 36 states. [2020-10-14 18:18:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:26,149 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-14 18:18:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:18:26,150 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-14 18:18:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:26,151 INFO L225 Difference]: With dead ends: 108 [2020-10-14 18:18:26,151 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 18:18:26,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=578, Invalid=904, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:18:26,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 18:18:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-14 18:18:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 18:18:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-14 18:18:26,158 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 80 [2020-10-14 18:18:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:26,159 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-14 18:18:26,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:18:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-14 18:18:26,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 18:18:26,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:26,160 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:26,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:18:26,161 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:26,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:26,161 INFO L82 PathProgramCache]: Analyzing trace with hash -751297338, now seen corresponding path program 31 times [2020-10-14 18:18:26,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:26,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377891035] [2020-10-14 18:18:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:26,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:26,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:30,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:30,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 18:18:30,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4028 [2020-10-14 18:18:30,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:30,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:18:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:18:30,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:30,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:30,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:30,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:30,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:30,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:30,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:18:30,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:30,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:30,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:30,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:30,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:30,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:30,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:31,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:31,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:18:31,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:31,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1312 [2020-10-14 18:18:31,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:31,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:18:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:18:31,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:32,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377891035] [2020-10-14 18:18:32,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:32,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:18:32,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183855396] [2020-10-14 18:18:32,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:18:32,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:32,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:18:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:18:32,442 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 37 states. [2020-10-14 18:18:32,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:32,840 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-14 18:18:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 18:18:32,841 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-14 18:18:32,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:32,842 INFO L225 Difference]: With dead ends: 110 [2020-10-14 18:18:32,843 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 18:18:32,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=948, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:18:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 18:18:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-14 18:18:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 18:18:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-14 18:18:32,855 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-14 18:18:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:32,856 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-14 18:18:32,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:18:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-14 18:18:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 18:18:32,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:32,857 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:32,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:18:32,857 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1441808120, now seen corresponding path program 32 times [2020-10-14 18:18:32,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:32,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328642747] [2020-10-14 18:18:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:32,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:32,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:36,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:36,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:18:36,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:36,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3680 [2020-10-14 18:18:36,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:36,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:36,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:18:36,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:36,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:18:36,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:36,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:36,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:36,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:36,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:36,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:36,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:36,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:36,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:36,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:36,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:36,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:36,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:36,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:36,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:37,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:37,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:18:37,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:37,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1286 [2020-10-14 18:18:37,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:37,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:37,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:18:37,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:37,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:18:37,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:38,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328642747] [2020-10-14 18:18:38,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:38,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 18:18:38,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335237744] [2020-10-14 18:18:38,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 18:18:38,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:38,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 18:18:38,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:18:38,822 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 38 states. [2020-10-14 18:18:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:39,292 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-14 18:18:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:18:39,293 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-14 18:18:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:39,294 INFO L225 Difference]: With dead ends: 112 [2020-10-14 18:18:39,294 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 18:18:39,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=647, Invalid=993, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:18:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 18:18:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-14 18:18:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 18:18:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-14 18:18:39,302 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2020-10-14 18:18:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:39,302 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-14 18:18:39,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 18:18:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-14 18:18:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 18:18:39,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:39,304 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:39,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:18:39,304 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:39,304 INFO L82 PathProgramCache]: Analyzing trace with hash 697261258, now seen corresponding path program 33 times [2020-10-14 18:18:39,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:39,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125911341] [2020-10-14 18:18:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:43,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:43,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 18:18:43,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:43,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3890 [2020-10-14 18:18:43,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:43,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:43,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:18:43,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:43,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:18:43,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:43,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:43,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:43,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:43,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:43,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:43,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:43,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:43,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:43,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:43,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:44,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:44,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 18:18:44,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:44,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1600 [2020-10-14 18:18:44,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:44,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:44,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:18:44,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:44,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 18:18:44,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:45,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125911341] [2020-10-14 18:18:45,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:45,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:18:45,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478427330] [2020-10-14 18:18:45,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:18:45,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:18:45,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:18:45,872 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 39 states. [2020-10-14 18:18:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:46,248 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-14 18:18:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:18:46,249 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-14 18:18:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:46,250 INFO L225 Difference]: With dead ends: 114 [2020-10-14 18:18:46,250 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 18:18:46,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=683, Invalid=1039, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:18:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 18:18:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 18:18:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 18:18:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-14 18:18:46,259 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 86 [2020-10-14 18:18:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:46,259 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-14 18:18:46,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:18:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-14 18:18:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 18:18:46,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:46,261 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:46,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:18:46,261 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash -946401268, now seen corresponding path program 34 times [2020-10-14 18:18:46,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:46,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133440644] [2020-10-14 18:18:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:46,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:50,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:50,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 18:18:50,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:50,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4321 [2020-10-14 18:18:50,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:50,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:50,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:18:50,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:50,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 18:18:50,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:50,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:50,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:50,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:50,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:50,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:50,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:50,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:50,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:50,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:50,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:50,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:52,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:52,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:18:52,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:52,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1629 [2020-10-14 18:18:52,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:52,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:52,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:18:52,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:52,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:18:52,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:53,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133440644] [2020-10-14 18:18:53,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:53,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:18:53,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429627580] [2020-10-14 18:18:53,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:18:53,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:53,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:18:53,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:18:53,293 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 40 states. [2020-10-14 18:18:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:53,802 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-14 18:18:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:18:53,803 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-14 18:18:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:53,804 INFO L225 Difference]: With dead ends: 116 [2020-10-14 18:18:53,804 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 18:18:53,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=720, Invalid=1086, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:18:53,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 18:18:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-14 18:18:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 18:18:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-14 18:18:53,815 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 88 [2020-10-14 18:18:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:53,816 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-14 18:18:53,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:18:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-14 18:18:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 18:18:53,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:53,817 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:53,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:18:53,818 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:53,818 INFO L82 PathProgramCache]: Analyzing trace with hash 41876174, now seen corresponding path program 35 times [2020-10-14 18:18:53,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:53,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782839929] [2020-10-14 18:18:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:53,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:58,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:58,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 18:18:58,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:58,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4815 [2020-10-14 18:18:58,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:58,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:58,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:18:58,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:18:58,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:18:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:58,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:58,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:58,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:58,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:58,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:58,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:18:58,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:58,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:18:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:18:58,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:58,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:18:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:58,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:00,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:00,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:19:00,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:00,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1740 [2020-10-14 18:19:00,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:00,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:19:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:19:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 18:19:00,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:19:02,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782839929] [2020-10-14 18:19:02,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:02,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:19:02,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195289836] [2020-10-14 18:19:02,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:19:02,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:02,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:19:02,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:19:02,786 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 41 states. [2020-10-14 18:19:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:19:03,361 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-10-14 18:19:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:19:03,362 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-14 18:19:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:19:03,363 INFO L225 Difference]: With dead ends: 118 [2020-10-14 18:19:03,364 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 18:19:03,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:19:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 18:19:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-14 18:19:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 18:19:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-14 18:19:03,372 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 90 [2020-10-14 18:19:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:19:03,372 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-14 18:19:03,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:19:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-14 18:19:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 18:19:03,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:19:03,374 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:19:03,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:19:03,374 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:19:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:19:03,374 INFO L82 PathProgramCache]: Analyzing trace with hash 588725520, now seen corresponding path program 36 times [2020-10-14 18:19:03,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:19:03,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579369079] [2020-10-14 18:19:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:19:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:03,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:03,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:08,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:08,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 18:19:08,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:19:08,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4993 [2020-10-14 18:19:08,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:08,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:19:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:19:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 18:19:08,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:08,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:08,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:08,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:08,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:08,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:08,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:08,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:08,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:08,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:08,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:08,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:08,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:08,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:19:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:08,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:10,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:10,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 18:19:10,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:10,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1709 [2020-10-14 18:19:10,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:10,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:19:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:19:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 18:19:10,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:19:11,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579369079] [2020-10-14 18:19:11,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:11,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:19:11,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057681484] [2020-10-14 18:19:11,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:19:11,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:11,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:19:11,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:19:11,316 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 42 states. [2020-10-14 18:19:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:19:11,839 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-14 18:19:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:19:11,840 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-14 18:19:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:19:11,841 INFO L225 Difference]: With dead ends: 120 [2020-10-14 18:19:11,841 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 18:19:11,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=797, Invalid=1183, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:19:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 18:19:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-14 18:19:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 18:19:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-14 18:19:11,848 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-14 18:19:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:19:11,849 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-14 18:19:11,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:19:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-14 18:19:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 18:19:11,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:19:11,850 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:19:11,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:19:11,850 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:19:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:19:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2124936914, now seen corresponding path program 37 times [2020-10-14 18:19:11,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:19:11,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226087830] [2020-10-14 18:19:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:19:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:11,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:16,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:16,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 18:19:16,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:19:16,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:19:16,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:16,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:19:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:19:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 18:19:16,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:19:16,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:16,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:16,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:16,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:16,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:16,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:16,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:16,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:16,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:16,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:16,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:19:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:16,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:18,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:18,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 18:19:18,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:18,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1878 [2020-10-14 18:19:18,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:18,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:18,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:19:18,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:19:18,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 18:19:18,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:19:20,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226087830] [2020-10-14 18:19:20,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:20,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 18:19:20,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646348056] [2020-10-14 18:19:20,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 18:19:20,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 18:19:20,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:19:20,017 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 43 states. [2020-10-14 18:19:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:19:20,572 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-14 18:19:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 18:19:20,572 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-14 18:19:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:19:20,574 INFO L225 Difference]: With dead ends: 122 [2020-10-14 18:19:20,574 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 18:19:20,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=837, Invalid=1233, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:19:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 18:19:20,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 18:19:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 18:19:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-14 18:19:20,580 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 94 [2020-10-14 18:19:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:19:20,581 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-14 18:19:20,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 18:19:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-14 18:19:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 18:19:20,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:19:20,582 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:19:20,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:19:20,582 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:19:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:19:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 955336724, now seen corresponding path program 38 times [2020-10-14 18:19:20,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:19:20,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893233322] [2020-10-14 18:19:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:19:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:20,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:20,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:25,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:25,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 18:19:25,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:19:25,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-14 18:19:25,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:25,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:25,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:19:25,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:19:25,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 18:19:25,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:25,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:25,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:25,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:25,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:25,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:25,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:25,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:25,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:25,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:25,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:19:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:27,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:27,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:19:27,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:27,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-10-14 18:19:27,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:27,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:27,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:19:27,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:19:27,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 18:19:27,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:19:30,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893233322] [2020-10-14 18:19:30,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:30,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 18:19:30,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967110441] [2020-10-14 18:19:30,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 18:19:30,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:30,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 18:19:30,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:19:30,403 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 44 states. [2020-10-14 18:19:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:19:31,028 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-14 18:19:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 18:19:31,028 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-14 18:19:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:19:31,030 INFO L225 Difference]: With dead ends: 124 [2020-10-14 18:19:31,030 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 18:19:31,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=916, Invalid=1246, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:19:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 18:19:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-14 18:19:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 18:19:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-14 18:19:31,036 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 96 [2020-10-14 18:19:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:19:31,036 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-14 18:19:31,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 18:19:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-14 18:19:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 18:19:31,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:19:31,037 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:19:31,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:19:31,038 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:19:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:19:31,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2043981610, now seen corresponding path program 39 times [2020-10-14 18:19:31,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:19:31,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076789910] [2020-10-14 18:19:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:19:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:31,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:31,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:36,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:36,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 18:19:36,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:19:36,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:19:36,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:36,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:19:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:19:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 18:19:36,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:36,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:36,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:36,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:36,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:36,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:36,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:36,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:36,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:36,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:36,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:19:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:36,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:38,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:38,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 18:19:38,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:38,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2142 [2020-10-14 18:19:38,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:38,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:38,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:19:38,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:19:38,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 18:19:38,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:19:39,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076789910] [2020-10-14 18:19:39,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:39,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 18:19:39,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552924770] [2020-10-14 18:19:39,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 18:19:39,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:39,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 18:19:39,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:19:39,649 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 45 states. [2020-10-14 18:19:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:19:40,057 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-14 18:19:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 18:19:40,058 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-14 18:19:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:19:40,059 INFO L225 Difference]: With dead ends: 126 [2020-10-14 18:19:40,059 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 18:19:40,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=920, Invalid=1336, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:19:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 18:19:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 18:19:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 18:19:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-14 18:19:40,067 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 98 [2020-10-14 18:19:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:19:40,067 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-14 18:19:40,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 18:19:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-14 18:19:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 18:19:40,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:19:40,068 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:19:40,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:19:40,068 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:19:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:19:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1829122328, now seen corresponding path program 40 times [2020-10-14 18:19:40,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:19:40,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8407135] [2020-10-14 18:19:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:19:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:40,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:40,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:45,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:45,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 18:19:45,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:19:45,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:19:45,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:45,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:19:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:19:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 18:19:45,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:45,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:45,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:45,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:45,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:45,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:45,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:19:45,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:45,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:45,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:45,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:45,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:45,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:45,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:19:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:47,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:47,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:19:47,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:47,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2336 [2020-10-14 18:19:47,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:47,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:47,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:19:47,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:19:47,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 18:19:47,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:19:50,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8407135] [2020-10-14 18:19:50,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:50,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 18:19:50,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906648089] [2020-10-14 18:19:50,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 18:19:50,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 18:19:50,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:19:50,394 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 46 states. [2020-10-14 18:19:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:19:51,038 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-14 18:19:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 18:19:51,039 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-14 18:19:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:19:51,040 INFO L225 Difference]: With dead ends: 128 [2020-10-14 18:19:51,040 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 18:19:51,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1003, Invalid=1349, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:19:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 18:19:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-14 18:19:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 18:19:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-14 18:19:51,047 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 100 [2020-10-14 18:19:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:19:51,047 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-14 18:19:51,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 18:19:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-14 18:19:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 18:19:51,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:19:51,048 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:19:51,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:19:51,049 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:19:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:19:51,049 INFO L82 PathProgramCache]: Analyzing trace with hash 145361114, now seen corresponding path program 41 times [2020-10-14 18:19:51,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:19:51,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225001127] [2020-10-14 18:19:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:19:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:51,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:51,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:56,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:56,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 18:19:56,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:19:56,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 18:19:56,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:56,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:56,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 18:19:56,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:19:56,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 18:19:56,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:56,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:56,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:56,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:56,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:56,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:56,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:56,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:56,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:56,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:56,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:19:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:56,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:58,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:58,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 18:19:58,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:58,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2350 [2020-10-14 18:19:58,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:58,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 18:19:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:19:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 18:19:58,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:01,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225001127] [2020-10-14 18:20:01,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:01,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 18:20:01,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734003610] [2020-10-14 18:20:01,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 18:20:01,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:01,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 18:20:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:20:01,561 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 47 states. [2020-10-14 18:20:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:02,063 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-14 18:20:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 18:20:02,064 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-14 18:20:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:02,065 INFO L225 Difference]: With dead ends: 130 [2020-10-14 18:20:02,065 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 18:20:02,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1048, Invalid=1402, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:20:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 18:20:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-14 18:20:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 18:20:02,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-14 18:20:02,073 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 102 [2020-10-14 18:20:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:02,073 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-14 18:20:02,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 18:20:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-14 18:20:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 18:20:02,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:02,074 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:02,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 18:20:02,075 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1253505052, now seen corresponding path program 42 times [2020-10-14 18:20:02,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:02,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535476944] [2020-10-14 18:20:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:02,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:02,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:07,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:07,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 18:20:07,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:07,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-14 18:20:07,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:07,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:07,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 18:20:07,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:07,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 18:20:07,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:07,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:07,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:07,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:07,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:07,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:07,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:07,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:07,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:07,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:07,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:20:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:07,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:09,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:09,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 18:20:09,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2567 [2020-10-14 18:20:09,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:09,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:09,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 18:20:09,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:20:09,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 18:20:09,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:11,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535476944] [2020-10-14 18:20:11,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:11,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 18:20:11,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901754204] [2020-10-14 18:20:11,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 18:20:11,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 18:20:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:20:11,357 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 48 states. [2020-10-14 18:20:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:11,791 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-10-14 18:20:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 18:20:11,791 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-14 18:20:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:11,793 INFO L225 Difference]: With dead ends: 132 [2020-10-14 18:20:11,793 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 18:20:11,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1052, Invalid=1498, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 18:20:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 18:20:11,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-14 18:20:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 18:20:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-10-14 18:20:11,801 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 104 [2020-10-14 18:20:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:11,802 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-10-14 18:20:11,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 18:20:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-10-14 18:20:11,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 18:20:11,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:11,803 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:11,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 18:20:11,803 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:11,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1027940062, now seen corresponding path program 43 times [2020-10-14 18:20:11,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:11,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763468096] [2020-10-14 18:20:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:11,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:16,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:16,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 18:20:16,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 18:20:16,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:16,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:16,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 18:20:16,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:16,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 18:20:16,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:16,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:16,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:16,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:16,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:16,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:16,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:20:16,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:16,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:16,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:16,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:16,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:16,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:16,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:20:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:19,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:19,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 18:20:19,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:19,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2803 [2020-10-14 18:20:19,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:19,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 18:20:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:20:19,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 18:20:19,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:23,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763468096] [2020-10-14 18:20:23,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:23,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 18:20:23,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175392764] [2020-10-14 18:20:23,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 18:20:23,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:23,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 18:20:23,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:20:23,075 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 49 states. [2020-10-14 18:20:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:23,786 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-14 18:20:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 18:20:23,787 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-14 18:20:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:23,788 INFO L225 Difference]: With dead ends: 134 [2020-10-14 18:20:23,789 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 18:20:23,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1141, Invalid=1511, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:20:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 18:20:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-14 18:20:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 18:20:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-10-14 18:20:23,796 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 106 [2020-10-14 18:20:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:23,797 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-10-14 18:20:23,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 18:20:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-10-14 18:20:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 18:20:23,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:23,798 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:23,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 18:20:23,798 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:23,798 INFO L82 PathProgramCache]: Analyzing trace with hash -991650528, now seen corresponding path program 44 times [2020-10-14 18:20:23,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:23,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43025031] [2020-10-14 18:20:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:23,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:23,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:28,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:28,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 18:20:28,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:28,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 18:20:28,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:28,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 18:20:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:28,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 18:20:28,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:28,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:28,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:28,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:28,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:28,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:28,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:28,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:28,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:28,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:28,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:28,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:28,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:28,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:20:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:28,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:31,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:31,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 18:20:31,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3032 [2020-10-14 18:20:31,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:31,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 18:20:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:20:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 18:20:31,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:33,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43025031] [2020-10-14 18:20:33,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:33,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 18:20:33,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452711666] [2020-10-14 18:20:33,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 18:20:33,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:33,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 18:20:33,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:20:33,653 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 50 states. [2020-10-14 18:20:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:34,326 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2020-10-14 18:20:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 18:20:34,327 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-14 18:20:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:34,328 INFO L225 Difference]: With dead ends: 136 [2020-10-14 18:20:34,328 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 18:20:34,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1145, Invalid=1611, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 18:20:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 18:20:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 18:20:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 18:20:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-14 18:20:34,335 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 108 [2020-10-14 18:20:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:34,336 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-14 18:20:34,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 18:20:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-14 18:20:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 18:20:34,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:34,337 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:34,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 18:20:34,337 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:34,338 INFO L82 PathProgramCache]: Analyzing trace with hash -492989726, now seen corresponding path program 45 times [2020-10-14 18:20:34,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:34,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673542853] [2020-10-14 18:20:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:34,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:39,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:39,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 18:20:39,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:39,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-14 18:20:39,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:39,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:39,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 18:20:39,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:39,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 18:20:39,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:39,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:39,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:39,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:39,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:39,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:39,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:39,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:39,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:39,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:39,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:39,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:39,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:39,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:20:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:39,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:42,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:42,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 18:20:42,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:42,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3151 [2020-10-14 18:20:42,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:42,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:42,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 18:20:42,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:20:42,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 18:20:42,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:44,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673542853] [2020-10-14 18:20:44,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:44,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 18:20:44,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928991738] [2020-10-14 18:20:44,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 18:20:44,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:44,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 18:20:44,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 18:20:44,424 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 51 states. [2020-10-14 18:20:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:44,887 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-10-14 18:20:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 18:20:44,888 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-14 18:20:44,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:44,889 INFO L225 Difference]: With dead ends: 138 [2020-10-14 18:20:44,890 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 18:20:44,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1193, Invalid=1669, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 18:20:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 18:20:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-14 18:20:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 18:20:44,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-10-14 18:20:44,896 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 110 [2020-10-14 18:20:44,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:44,897 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-10-14 18:20:44,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 18:20:44,897 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-10-14 18:20:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 18:20:44,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:44,898 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:44,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 18:20:44,898 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:44,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:44,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1978671140, now seen corresponding path program 46 times [2020-10-14 18:20:44,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:44,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133924357] [2020-10-14 18:20:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:44,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:45,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:49,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:49,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 18:20:49,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:49,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:20:49,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:49,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:49,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 18:20:49,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:49,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 18:20:49,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:49,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:49,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:49,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:49,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:49,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:49,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:49,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:49,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:49,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:49,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:20:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:50,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:53,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:53,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 18:20:53,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:53,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3279 [2020-10-14 18:20:53,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:53,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:53,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 18:20:53,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:20:53,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 18:20:53,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:20:56,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133924357] [2020-10-14 18:20:56,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:56,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 18:20:56,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560969325] [2020-10-14 18:20:56,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 18:20:56,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:56,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 18:20:56,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:20:56,927 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 52 states. [2020-10-14 18:20:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:57,555 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-10-14 18:20:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 18:20:57,556 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-14 18:20:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:57,557 INFO L225 Difference]: With dead ends: 140 [2020-10-14 18:20:57,557 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 18:20:57,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1288, Invalid=1682, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 18:20:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 18:20:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 18:20:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 18:20:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2020-10-14 18:20:57,565 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 112 [2020-10-14 18:20:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:57,565 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2020-10-14 18:20:57,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 18:20:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2020-10-14 18:20:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 18:20:57,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:57,566 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:57,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 18:20:57,567 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:57,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2127848678, now seen corresponding path program 47 times [2020-10-14 18:20:57,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:57,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734325654] [2020-10-14 18:20:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:57,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:57,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:02,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:02,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 18:21:02,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:02,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 18:21:02,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:02,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:02,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 18:21:02,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:21:02,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 18:21:02,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:02,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:02,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:02,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:02,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:02,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:02,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:02,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:02,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:02,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:02,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:02,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:02,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:02,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 18:21:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:02,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:06,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:06,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 18:21:06,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:06,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3354 [2020-10-14 18:21:06,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:06,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 18:21:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:21:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 18:21:06,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:21:09,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734325654] [2020-10-14 18:21:09,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:09,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 18:21:09,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210040842] [2020-10-14 18:21:09,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 18:21:09,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:09,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 18:21:09,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 18:21:09,881 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 53 states. [2020-10-14 18:21:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:10,604 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2020-10-14 18:21:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 18:21:10,605 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-14 18:21:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:10,607 INFO L225 Difference]: With dead ends: 142 [2020-10-14 18:21:10,607 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 18:21:10,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1339, Invalid=1741, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 18:21:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 18:21:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-14 18:21:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 18:21:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-10-14 18:21:10,614 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 114 [2020-10-14 18:21:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:10,615 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-10-14 18:21:10,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 18:21:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-10-14 18:21:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 18:21:10,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:10,616 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:10,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 18:21:10,616 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:10,616 INFO L82 PathProgramCache]: Analyzing trace with hash -541425368, now seen corresponding path program 48 times [2020-10-14 18:21:10,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:10,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121174831] [2020-10-14 18:21:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:10,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking...