/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 SingleStatement --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=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:14:35,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:14:35,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:14:35,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:14:35,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:14:35,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:14:35,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:14:35,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:14:35,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:14:35,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:14:35,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:14:35,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:14:35,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:14:35,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:14:35,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:14:35,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:14:35,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:14:35,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:14:35,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:14:35,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:14:35,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:14:35,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:14:35,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:14:35,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:14:35,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:14:35,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:14:35,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:14:35,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:14:35,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:14:35,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:14:35,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:14:35,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:14:35,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:14:35,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:14:35,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:14:35,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:14:35,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:14:35,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:14:35,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:14:35,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:14:35,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:14:35,938 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 [2020-09-25 03:14:35,965 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:14:35,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:14:35,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:14:35,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:14:35,967 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:14:35,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:14:35,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:14:35,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:14:35,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:14:35,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:14:35,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:14:35,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:14:35,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:14:35,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:14:35,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:14:35,970 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:14:35,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:14:35,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:14:35,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:14:35,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:14:35,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:14:35,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:14:35,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:14:35,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:14:35,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:14:35,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:14:35,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:14:35,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:14:35,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:14:35,973 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 -> SingleStatement 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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=true; [2020-09-25 03:14:36,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:14:36,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:14:36,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:14:36,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:14:36,505 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:14:36,506 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-25 03:14:36,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bc567418/c77ead8c5508428b9c21769f2d9d7a40/FLAG4c0054d82 [2020-09-25 03:14:37,127 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:14:37,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-25 03:14:37,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bc567418/c77ead8c5508428b9c21769f2d9d7a40/FLAG4c0054d82 [2020-09-25 03:14:37,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bc567418/c77ead8c5508428b9c21769f2d9d7a40 [2020-09-25 03:14:37,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:14:37,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:14:37,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:14:37,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:14:37,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:14:37,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:14:37" (1/1) ... [2020-09-25 03:14:37,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6017e0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37, skipping insertion in model container [2020-09-25 03:14:37,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:14:37" (1/1) ... [2020-09-25 03:14:37,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:14:37,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:14:37,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:14:37,780 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:14:37,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:14:37,902 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:14:37,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37 WrapperNode [2020-09-25 03:14:37,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:14:37,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:14:37,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:14:37,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:14:37,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37" (1/1) ... [2020-09-25 03:14:37,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37" (1/1) ... [2020-09-25 03:14:37,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37" (1/1) ... [2020-09-25 03:14:37,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37" (1/1) ... [2020-09-25 03:14:37,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37" (1/1) ... [2020-09-25 03:14:37,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37" (1/1) ... [2020-09-25 03:14:37,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37" (1/1) ... [2020-09-25 03:14:37,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:14:37,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:14:37,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:14:37,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:14:37,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37" (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 [2020-09-25 03:14:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:14:38,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:14:38,031 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 03:14:38,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:14:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:14:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 03:14:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 03:14:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 03:14:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:14:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 03:14:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 03:14:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 03:14:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:14:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:14:38,407 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:14:38,407 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 03:14:38,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:14:38 BoogieIcfgContainer [2020-09-25 03:14:38,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:14:38,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:14:38,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:14:38,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:14:38,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:14:37" (1/3) ... [2020-09-25 03:14:38,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ea95b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:14:38, skipping insertion in model container [2020-09-25 03:14:38,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:14:37" (2/3) ... [2020-09-25 03:14:38,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ea95b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:14:38, skipping insertion in model container [2020-09-25 03:14:38,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:14:38" (3/3) ... [2020-09-25 03:14:38,423 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-25 03:14:38,436 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:14:38,446 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:14:38,469 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:14:38,499 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:14:38,499 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:14:38,499 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:14:38,499 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:14:38,499 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:14:38,499 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:14:38,499 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:14:38,500 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:14:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-25 03:14:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 03:14:38,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:38,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:38,533 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-09-25 03:14:38,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:38,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143158677] [2020-09-25 03:14:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:38,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:38,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:38,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 03:14:38,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:14:38,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-09-25 03:14:38,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:38,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 03:14:38,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:38,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:14:38,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:39,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:39,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:39,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:39,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:39,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 03:14:39,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:39,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:39,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:39,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:39,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:39,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 03:14:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:39,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:39,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:39,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:39,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:39,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 03:14:39,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:39,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:39,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:39,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:39,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:39,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143158677] [2020-09-25 03:14:39,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:14:39,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 03:14:39,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325573247] [2020-09-25 03:14:39,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 03:14:39,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:39,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 03:14:39,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 03:14:39,105 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-25 03:14:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:39,266 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-25 03:14:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 03:14:39,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 03:14:39,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:39,282 INFO L225 Difference]: With dead ends: 102 [2020-09-25 03:14:39,282 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 03:14:39,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 03:14:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 03:14:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-25 03:14:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 03:14:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-25 03:14:39,343 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-09-25 03:14:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:39,344 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-25 03:14:39,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 03:14:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-25 03:14:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 03:14:39,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:39,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:39,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:14:39,347 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:39,348 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-09-25 03:14:39,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:39,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762358874] [2020-09-25 03:14:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:39,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:39,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:39,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 03:14:39,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:39,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-09-25 03:14:39,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:39,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:14:39,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:39,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 03:14:39,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:39,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:39,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:39,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:39,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:39,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:39,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 03:14:39,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:39,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:39,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:39,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:39,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 03:14:39,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-25 03:14:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:39,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:39,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:39,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:39,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:39,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 03:14:39,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:39,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:39,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:39,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:39,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:39,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762358874] [2020-09-25 03:14:39,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:14:39,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 03:14:39,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837831210] [2020-09-25 03:14:39,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 03:14:39,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 03:14:39,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 03:14:39,671 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-09-25 03:14:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:39,818 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-09-25 03:14:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 03:14:39,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-09-25 03:14:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:39,821 INFO L225 Difference]: With dead ends: 92 [2020-09-25 03:14:39,821 INFO L226 Difference]: Without dead ends: 62 [2020-09-25 03:14:39,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 03:14:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-25 03:14:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-09-25 03:14:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-25 03:14:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-25 03:14:39,832 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-09-25 03:14:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:39,832 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-25 03:14:39,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 03:14:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-25 03:14:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 03:14:39,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:39,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:39,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:14:39,835 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-09-25 03:14:39,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:39,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399569747] [2020-09-25 03:14:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:39,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:40,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:40,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 03:14:40,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:40,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-09-25 03:14:40,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:40,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:14:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 03:14:40,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:40,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:40,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:40,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:40,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:40,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:40,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 03:14:40,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:40,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:40,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 03:14:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:40,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:40,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:40,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:40,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 03:14:40,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:40,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:40,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399569747] [2020-09-25 03:14:40,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:40,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 03:14:40,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483664414] [2020-09-25 03:14:40,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 03:14:40,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 03:14:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:14:40,131 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-09-25 03:14:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:40,288 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-09-25 03:14:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 03:14:40,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-25 03:14:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:40,291 INFO L225 Difference]: With dead ends: 102 [2020-09-25 03:14:40,291 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 03:14:40,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:14:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 03:14:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-09-25 03:14:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 03:14:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-25 03:14:40,301 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-09-25 03:14:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:40,301 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-25 03:14:40,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 03:14:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-25 03:14:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 03:14:40,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:40,304 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:40,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:14:40,304 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-09-25 03:14:40,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:40,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364715624] [2020-09-25 03:14:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:40,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:40,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 03:14:40,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:40,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-09-25 03:14:40,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:40,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:14:40,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:40,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 03:14:40,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:40,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:40,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:40,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:40,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:40,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:40,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:14:40,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:40,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:40,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:40,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:40,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:40,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-25 03:14:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:40,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:40,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:40,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:40,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:40,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 03:14:40,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:40,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:40,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:40,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:40,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:40,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364715624] [2020-09-25 03:14:40,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:40,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 03:14:40,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739809133] [2020-09-25 03:14:40,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:14:40,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:40,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:14:40,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:14:40,674 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-09-25 03:14:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:40,883 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-09-25 03:14:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 03:14:40,883 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-25 03:14:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:40,884 INFO L225 Difference]: With dead ends: 112 [2020-09-25 03:14:40,885 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 03:14:40,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:14:40,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 03:14:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-09-25 03:14:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 03:14:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-09-25 03:14:40,894 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-09-25 03:14:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:40,894 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-09-25 03:14:40,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:14:40,895 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-09-25 03:14:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 03:14:40,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:40,896 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:40,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:14:40,897 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-09-25 03:14:40,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:40,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902359002] [2020-09-25 03:14:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:40,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:41,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:41,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 03:14:41,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:41,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-09-25 03:14:41,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:14:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 03:14:41,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:41,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:41,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:41,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:41,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:41,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:14:41,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:41,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 03:14:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:41,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:41,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:41,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:41,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:41,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 03:14:41,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:41,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:41,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:41,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:41,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:41,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902359002] [2020-09-25 03:14:41,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:41,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 03:14:41,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224951690] [2020-09-25 03:14:41,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:14:41,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:41,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:14:41,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:14:41,372 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-09-25 03:14:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:41,595 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-09-25 03:14:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 03:14:41,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 03:14:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:41,597 INFO L225 Difference]: With dead ends: 122 [2020-09-25 03:14:41,597 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 03:14:41,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:14:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 03:14:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-25 03:14:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-25 03:14:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-25 03:14:41,606 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-09-25 03:14:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:41,607 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-25 03:14:41,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:14:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-25 03:14:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 03:14:41,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:41,609 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:41,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:14:41,609 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:41,613 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-09-25 03:14:41,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:41,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294461921] [2020-09-25 03:14:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:41,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:42,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:42,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 03:14:42,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:42,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-09-25 03:14:42,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:14:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:42,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 03:14:42,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 03:14:42,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:42,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:42,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:42,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:42,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:42,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:14:42,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:42,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:42,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-25 03:14:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:42,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:42,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:42,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:42,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:42,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 03:14:42,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:42,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:42,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:42,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294461921] [2020-09-25 03:14:42,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:42,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:14:42,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373455450] [2020-09-25 03:14:42,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:14:42,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:42,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:14:42,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:14:42,326 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-09-25 03:14:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:42,581 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-09-25 03:14:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 03:14:42,582 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-25 03:14:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:42,583 INFO L225 Difference]: With dead ends: 132 [2020-09-25 03:14:42,583 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 03:14:42,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 03:14:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 03:14:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-09-25 03:14:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-25 03:14:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-09-25 03:14:42,592 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-09-25 03:14:42,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:42,593 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-09-25 03:14:42,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:14:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-09-25 03:14:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 03:14:42,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:42,595 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:42,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:14:42,595 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:42,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-09-25 03:14:42,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:42,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814126137] [2020-09-25 03:14:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:42,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:43,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:43,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 03:14:43,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:43,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-09-25 03:14:43,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:14:43,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:43,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 03:14:43,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:43,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:43,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:43,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:43,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:43,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:43,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:14:43,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:43,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:43,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:43,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:43,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:43,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-25 03:14:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:43,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:43,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:43,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:43,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:43,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:14:43,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:43,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:43,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814126137] [2020-09-25 03:14:43,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:43,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 03:14:43,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884881241] [2020-09-25 03:14:43,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 03:14:43,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:43,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 03:14:43,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:14:43,397 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-09-25 03:14:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:43,724 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-09-25 03:14:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 03:14:43,725 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-09-25 03:14:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:43,726 INFO L225 Difference]: With dead ends: 142 [2020-09-25 03:14:43,727 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 03:14:43,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:14:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 03:14:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-09-25 03:14:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 03:14:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-09-25 03:14:43,743 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-09-25 03:14:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:43,743 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-09-25 03:14:43,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 03:14:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-09-25 03:14:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-25 03:14:43,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:43,745 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:43,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:14:43,746 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:43,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-09-25 03:14:43,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:43,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443373096] [2020-09-25 03:14:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:43,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:44,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:44,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-25 03:14:44,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:44,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-09-25 03:14:44,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:44,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 03:14:44,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:44,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 03:14:44,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:44,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:44,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:44,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:44,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:44,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:44,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:14:44,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:44,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:44,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:44,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:44,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:44,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-25 03:14:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:44,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:44,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:44,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:44,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:44,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 03:14:44,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:44,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:44,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:44,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443373096] [2020-09-25 03:14:44,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:44,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 03:14:44,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389769385] [2020-09-25 03:14:44,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 03:14:44,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 03:14:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:14:44,828 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-09-25 03:14:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:45,247 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-25 03:14:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 03:14:45,248 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-09-25 03:14:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:45,250 INFO L225 Difference]: With dead ends: 152 [2020-09-25 03:14:45,250 INFO L226 Difference]: Without dead ends: 122 [2020-09-25 03:14:45,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-25 03:14:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-25 03:14:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-09-25 03:14:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 03:14:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-25 03:14:45,257 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-09-25 03:14:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:45,258 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-25 03:14:45,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 03:14:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-25 03:14:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-25 03:14:45,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:45,260 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:45,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:14:45,260 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:45,261 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-09-25 03:14:45,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:45,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254602626] [2020-09-25 03:14:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:45,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:46,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:46,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-25 03:14:46,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:46,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-09-25 03:14:46,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 03:14:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 03:14:46,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:46,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:46,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:46,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:46,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:46,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:46,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:14:46,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:46,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:46,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-25 03:14:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:46,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:46,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:46,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:46,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:46,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 03:14:46,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:46,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:46,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:46,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:46,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:46,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254602626] [2020-09-25 03:14:46,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:46,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 03:14:46,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745643619] [2020-09-25 03:14:46,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 03:14:46,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 03:14:46,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-25 03:14:46,582 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-09-25 03:14:47,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:47,022 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-25 03:14:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 03:14:47,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-09-25 03:14:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:47,023 INFO L225 Difference]: With dead ends: 162 [2020-09-25 03:14:47,024 INFO L226 Difference]: Without dead ends: 132 [2020-09-25 03:14:47,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-25 03:14:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-25 03:14:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-25 03:14:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-25 03:14:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-09-25 03:14:47,030 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-09-25 03:14:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:47,031 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-09-25 03:14:47,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 03:14:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-09-25 03:14:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-25 03:14:47,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:47,033 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:47,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:14:47,033 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:47,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-09-25 03:14:47,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:47,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267483431] [2020-09-25 03:14:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:47,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:48,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:48,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-25 03:14:48,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:48,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1112 [2020-09-25 03:14:48,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:48,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 03:14:48,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:48,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-25 03:14:48,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:48,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:48,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:48,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:48,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:48,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:48,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:14:48,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:48,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:48,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-25 03:14:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:48,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:48,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:48,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:48,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:48,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:14:48,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:48,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:48,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267483431] [2020-09-25 03:14:48,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:48,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 03:14:48,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296486159] [2020-09-25 03:14:48,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 03:14:48,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 03:14:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-25 03:14:48,452 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-09-25 03:14:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:48,958 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-09-25 03:14:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 03:14:48,959 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-09-25 03:14:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:48,960 INFO L225 Difference]: With dead ends: 172 [2020-09-25 03:14:48,960 INFO L226 Difference]: Without dead ends: 142 [2020-09-25 03:14:48,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 03:14:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-25 03:14:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-09-25 03:14:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-25 03:14:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-09-25 03:14:48,966 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-09-25 03:14:48,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:48,967 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-09-25 03:14:48,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 03:14:48,967 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-09-25 03:14:48,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-25 03:14:48,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:48,968 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:48,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 03:14:48,969 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-09-25 03:14:48,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:48,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553877786] [2020-09-25 03:14:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:49,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:50,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:50,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-25 03:14:50,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:50,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-09-25 03:14:50,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 03:14:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-25 03:14:50,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:50,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:50,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:50,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:50,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:50,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:50,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:14:50,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:50,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:50,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:50,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:50,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:50,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-25 03:14:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:50,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:50,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:50,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:50,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:14:50,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:50,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:50,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:50,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:50,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:50,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553877786] [2020-09-25 03:14:50,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:50,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 03:14:50,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076138472] [2020-09-25 03:14:50,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 03:14:50,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:50,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 03:14:50,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-25 03:14:50,547 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-09-25 03:14:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:51,275 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-25 03:14:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 03:14:51,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-09-25 03:14:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:51,277 INFO L225 Difference]: With dead ends: 182 [2020-09-25 03:14:51,277 INFO L226 Difference]: Without dead ends: 152 [2020-09-25 03:14:51,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 03:14:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-25 03:14:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-09-25 03:14:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-25 03:14:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-25 03:14:51,283 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-09-25 03:14:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:51,284 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-25 03:14:51,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 03:14:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-25 03:14:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-25 03:14:51,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:51,286 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:51,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 03:14:51,286 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:51,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-09-25 03:14:51,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:51,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476017894] [2020-09-25 03:14:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:51,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:52,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:52,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-25 03:14:52,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:52,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1584 [2020-09-25 03:14:52,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:52,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 03:14:52,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:52,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-25 03:14:52,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:53,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:53,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:53,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:53,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:14:53,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:53,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:53,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-25 03:14:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:53,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:53,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:53,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:53,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:53,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:14:53,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:53,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:53,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476017894] [2020-09-25 03:14:53,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:53,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 03:14:53,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550893995] [2020-09-25 03:14:53,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 03:14:53,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:53,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 03:14:53,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:14:53,357 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-09-25 03:14:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:54,184 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-09-25 03:14:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-25 03:14:54,186 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-09-25 03:14:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:54,188 INFO L225 Difference]: With dead ends: 192 [2020-09-25 03:14:54,188 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 03:14:54,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 03:14:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 03:14:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-09-25 03:14:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-25 03:14:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-09-25 03:14:54,200 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-09-25 03:14:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:54,200 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-09-25 03:14:54,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 03:14:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-09-25 03:14:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-25 03:14:54,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:54,202 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:54,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 03:14:54,203 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-09-25 03:14:54,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:54,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244157911] [2020-09-25 03:14:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:54,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:56,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:56,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-25 03:14:56,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:56,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1858 [2020-09-25 03:14:56,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 03:14:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-25 03:14:56,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:56,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:56,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:56,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:56,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:56,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:56,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:14:56,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:56,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:56,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:56,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:56,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:56,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-25 03:14:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:56,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:56,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:56,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:56,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:56,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:14:56,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:56,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:56,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:56,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:14:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:56,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244157911] [2020-09-25 03:14:56,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:56,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 03:14:56,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107865968] [2020-09-25 03:14:56,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 03:14:56,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 03:14:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-25 03:14:56,553 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-09-25 03:14:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:14:57,293 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-09-25 03:14:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 03:14:57,294 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-09-25 03:14:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:14:57,296 INFO L225 Difference]: With dead ends: 202 [2020-09-25 03:14:57,296 INFO L226 Difference]: Without dead ends: 172 [2020-09-25 03:14:57,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 03:14:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-25 03:14:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-09-25 03:14:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-25 03:14:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-09-25 03:14:57,307 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-09-25 03:14:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:14:57,308 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-09-25 03:14:57,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 03:14:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-09-25 03:14:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-25 03:14:57,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:14:57,310 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:14:57,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 03:14:57,310 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:14:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:14:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-09-25 03:14:57,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:14:57,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231564059] [2020-09-25 03:14:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:14:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:57,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:59,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:59,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-25 03:14:59,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:59,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2092 [2020-09-25 03:14:59,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:59,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 03:14:59,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:14:59,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 03:14:59,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:59,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:14:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:59,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:59,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:59,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:14:59,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:59,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:14:59,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:14:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:59,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:59,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-25 03:14:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:14:59,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:14:59,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:14:59,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:14:59,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:14:59,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:14:59,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:14:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:14:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:14:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:14:59,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:14:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:14:59,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231564059] [2020-09-25 03:14:59,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:14:59,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-25 03:14:59,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476141132] [2020-09-25 03:14:59,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-25 03:14:59,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:14:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-25 03:14:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-25 03:14:59,894 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-09-25 03:15:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:15:00,836 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-09-25 03:15:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 03:15:00,837 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-09-25 03:15:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:15:00,839 INFO L225 Difference]: With dead ends: 212 [2020-09-25 03:15:00,839 INFO L226 Difference]: Without dead ends: 182 [2020-09-25 03:15:00,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 03:15:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-25 03:15:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-09-25 03:15:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-25 03:15:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-09-25 03:15:00,846 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-09-25 03:15:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:15:00,847 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-09-25 03:15:00,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-25 03:15:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-09-25 03:15:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-25 03:15:00,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:15:00,849 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:15:00,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 03:15:00,849 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:15:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:15:00,850 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-09-25 03:15:00,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:15:00,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795675802] [2020-09-25 03:15:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:15:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:03,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:03,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-25 03:15:03,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:03,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2168 [2020-09-25 03:15:03,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:03,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 03:15:03,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:15:03,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-25 03:15:03,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:03,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:15:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:03,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:03,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:03,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:15:03,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:03,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:15:03,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:03,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:03,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:15:03,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:03,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:03,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-25 03:15:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:03,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:03,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:03,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:15:03,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:03,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:15:03,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:03,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:03,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:15:03,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:03,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:15:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:15:03,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795675802] [2020-09-25 03:15:03,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:15:03,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 03:15:03,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013006724] [2020-09-25 03:15:03,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 03:15:03,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:15:03,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 03:15:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-25 03:15:03,583 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-09-25 03:15:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:15:04,553 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-09-25 03:15:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 03:15:04,553 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-09-25 03:15:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:15:04,555 INFO L225 Difference]: With dead ends: 222 [2020-09-25 03:15:04,555 INFO L226 Difference]: Without dead ends: 192 [2020-09-25 03:15:04,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 03:15:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-25 03:15:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-09-25 03:15:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 03:15:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-09-25 03:15:04,561 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-09-25 03:15:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:15:04,562 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-09-25 03:15:04,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 03:15:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-09-25 03:15:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-25 03:15:04,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:15:04,564 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:15:04,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 03:15:04,564 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:15:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:15:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-09-25 03:15:04,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:15:04,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669945532] [2020-09-25 03:15:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:15:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:07,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:07,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 03:15:07,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:07,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2701 [2020-09-25 03:15:07,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:07,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-25 03:15:07,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:15:07,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 03:15:07,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:07,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:15:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:07,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:07,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:07,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:15:07,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:07,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:15:07,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:07,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:07,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:15:07,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:07,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:07,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-25 03:15:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:07,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:07,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:07,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:15:07,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:07,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:15:07,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:07,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:07,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:15:07,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:07,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:15:07,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669945532] [2020-09-25 03:15:07,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:15:07,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-25 03:15:07,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399945590] [2020-09-25 03:15:07,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-25 03:15:07,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:15:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-25 03:15:07,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-25 03:15:07,858 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-09-25 03:15:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:15:08,893 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-09-25 03:15:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-25 03:15:08,893 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-09-25 03:15:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:15:08,895 INFO L225 Difference]: With dead ends: 232 [2020-09-25 03:15:08,896 INFO L226 Difference]: Without dead ends: 202 [2020-09-25 03:15:08,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-25 03:15:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-25 03:15:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-09-25 03:15:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-25 03:15:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-09-25 03:15:08,903 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-09-25 03:15:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:15:08,904 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-09-25 03:15:08,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-25 03:15:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-09-25 03:15:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-25 03:15:08,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:15:08,906 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:15:08,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 03:15:08,906 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:15:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:15:08,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-09-25 03:15:08,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:15:08,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435670714] [2020-09-25 03:15:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:15:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:08,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:11,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:11,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-25 03:15:11,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:11,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2682 [2020-09-25 03:15:11,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:11,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 03:15:11,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:15:11,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-09-25 03:15:11,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:12,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:15:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:12,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:12,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:12,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:15:12,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:12,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:15:12,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:15:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:12,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:12,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-25 03:15:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:12,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:12,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:12,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:15:12,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:12,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:15:12,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:12,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:12,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:15:12,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:12,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:15:12,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435670714] [2020-09-25 03:15:12,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:15:12,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-25 03:15:12,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617252981] [2020-09-25 03:15:12,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-25 03:15:12,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:15:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-25 03:15:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 03:15:12,332 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-09-25 03:15:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:15:13,474 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-09-25 03:15:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-25 03:15:13,474 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-09-25 03:15:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:15:13,479 INFO L225 Difference]: With dead ends: 242 [2020-09-25 03:15:13,479 INFO L226 Difference]: Without dead ends: 212 [2020-09-25 03:15:13,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-25 03:15:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-25 03:15:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-09-25 03:15:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-25 03:15:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-25 03:15:13,495 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-09-25 03:15:13,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:15:13,496 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-25 03:15:13,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-25 03:15:13,496 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-25 03:15:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-25 03:15:13,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:15:13,501 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:15:13,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 03:15:13,502 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:15:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:15:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-09-25 03:15:13,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:15:13,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680572587] [2020-09-25 03:15:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:15:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:13,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:16,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:16,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-09-25 03:15:16,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:16,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2757 [2020-09-25 03:15:16,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:16,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 03:15:16,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:15:16,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-09-25 03:15:16,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:17,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:15:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:17,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:17,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:17,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:15:17,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:17,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:15:17,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:17,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:17,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:15:17,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:17,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:17,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-25 03:15:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:17,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:17,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:17,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:15:17,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:17,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:15:17,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:15:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:15:17,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680572587] [2020-09-25 03:15:17,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:15:17,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-25 03:15:17,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337582672] [2020-09-25 03:15:17,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-25 03:15:17,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:15:17,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-25 03:15:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 03:15:17,089 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-09-25 03:15:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:15:18,474 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-09-25 03:15:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-25 03:15:18,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-09-25 03:15:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:15:18,476 INFO L225 Difference]: With dead ends: 252 [2020-09-25 03:15:18,476 INFO L226 Difference]: Without dead ends: 222 [2020-09-25 03:15:18,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-25 03:15:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-25 03:15:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-09-25 03:15:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-25 03:15:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-09-25 03:15:18,495 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-09-25 03:15:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:15:18,495 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-09-25 03:15:18,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-25 03:15:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-09-25 03:15:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-25 03:15:18,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:15:18,500 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:15:18,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 03:15:18,501 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:15:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:15:18,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-09-25 03:15:18,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:15:18,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364163295] [2020-09-25 03:15:18,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:15:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:21,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:21,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-25 03:15:21,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:21,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3015 [2020-09-25 03:15:21,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:21,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-25 03:15:21,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:15:21,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-09-25 03:15:21,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:22,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:15:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:22,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:22,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:22,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:15:22,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:22,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:15:22,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:15:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:22,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:22,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-25 03:15:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:22,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:22,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:22,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:15:22,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:22,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:15:22,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:15:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 03:15:22,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:15:22,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:15:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:15:22,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364163295] [2020-09-25 03:15:22,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:15:22,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-25 03:15:22,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181172636] [2020-09-25 03:15:22,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-25 03:15:22,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:15:22,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-25 03:15:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-25 03:15:22,392 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-09-25 03:15:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:15:23,987 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-09-25 03:15:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-25 03:15:23,992 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-09-25 03:15:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:15:23,994 INFO L225 Difference]: With dead ends: 262 [2020-09-25 03:15:23,994 INFO L226 Difference]: Without dead ends: 232 [2020-09-25 03:15:23,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-25 03:15:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-25 03:15:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-09-25 03:15:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-25 03:15:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-09-25 03:15:24,003 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-09-25 03:15:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:15:24,003 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-09-25 03:15:24,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-25 03:15:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-09-25 03:15:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-25 03:15:24,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:15:24,005 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:15:24,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 03:15:24,006 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:15:24,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:15:24,006 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-09-25 03:15:24,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:15:24,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621687842] [2020-09-25 03:15:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:15:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:15:24,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:15:27,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:15:27,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-09-25 03:15:27,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:15:27,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3619 [2020-09-25 03:15:27,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:15:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-25 03:15:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:15:27,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-09-25 03:15:27,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1