/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:54:43,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:54:43,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:54:43,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:54:43,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:54:43,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:54:43,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:54:43,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:54:43,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:54:43,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:54:43,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:54:43,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:54:43,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:54:43,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:54:43,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:54:43,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:54:43,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:54:43,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:54:43,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:54:43,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:54:43,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:54:43,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:54:43,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:54:43,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:54:43,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:54:43,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:54:43,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:54:43,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:54:43,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:54:43,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:54:43,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:54:43,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:54:43,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:54:43,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:54:43,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:54:43,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:54:43,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:54:43,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:54:43,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:54:43,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:54:43,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:54:43,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:54:43,958 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:54:43,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:54:43,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:54:43,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:54:43,960 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:54:43,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:54:43,961 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:54:43,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:54:43,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:54:43,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:54:43,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:54:43,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:54:43,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:54:43,962 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:54:43,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:54:43,963 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:54:43,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:54:43,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:54:43,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:54:43,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:54:43,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:54:43,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:54:43,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:54:43,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:54:43,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:54:43,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:54:43,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:54:43,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:54:43,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:54:43,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:54:44,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:54:44,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:54:44,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:54:44,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:54:44,358 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:54:44,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2020-10-28 08:54:44,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7cc13fd28/10ea9461fcdb42719cac1d5550916df1/FLAG01e7c4740 [2020-10-28 08:54:45,167 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:54:45,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2020-10-28 08:54:45,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7cc13fd28/10ea9461fcdb42719cac1d5550916df1/FLAG01e7c4740 [2020-10-28 08:54:45,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7cc13fd28/10ea9461fcdb42719cac1d5550916df1 [2020-10-28 08:54:45,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:54:45,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:54:45,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:54:45,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:54:45,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:54:45,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:45" (1/1) ... [2020-10-28 08:54:45,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c25aa6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45, skipping insertion in model container [2020-10-28 08:54:45,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:45" (1/1) ... [2020-10-28 08:54:45,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:54:45,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:54:45,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:54:45,760 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:54:45,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:54:45,804 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:54:45,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45 WrapperNode [2020-10-28 08:54:45,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:54:45,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:54:45,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:54:45,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:54:45,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45" (1/1) ... [2020-10-28 08:54:45,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45" (1/1) ... [2020-10-28 08:54:45,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45" (1/1) ... [2020-10-28 08:54:45,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45" (1/1) ... [2020-10-28 08:54:45,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45" (1/1) ... [2020-10-28 08:54:45,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45" (1/1) ... [2020-10-28 08:54:45,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45" (1/1) ... [2020-10-28 08:54:45,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:54:45,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:54:45,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:54:45,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:54:45,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:54:45,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:54:45,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:54:45,936 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:54:45,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:54:45,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:54:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:54:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:54:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:54:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:54:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:54:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:54:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:54:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:54:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:54:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:54:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:54:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:54:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:54:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:54:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:54:46,427 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:54:46,427 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 08:54:46,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:46 BoogieIcfgContainer [2020-10-28 08:54:46,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:54:46,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:54:46,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:54:46,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:54:46,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:54:45" (1/3) ... [2020-10-28 08:54:46,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf5eaf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:46, skipping insertion in model container [2020-10-28 08:54:46,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:45" (2/3) ... [2020-10-28 08:54:46,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf5eaf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:46, skipping insertion in model container [2020-10-28 08:54:46,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:46" (3/3) ... [2020-10-28 08:54:46,438 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2020-10-28 08:54:46,451 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:54:46,455 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:54:46,470 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:54:46,500 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:54:46,501 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:54:46,501 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:54:46,501 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:54:46,501 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:54:46,501 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:54:46,501 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:54:46,502 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:54:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-28 08:54:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:54:46,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:46,527 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] [2020-10-28 08:54:46,527 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:46,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2093384956, now seen corresponding path program 1 times [2020-10-28 08:54:46,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:46,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843323770] [2020-10-28 08:54:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:46,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:47,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:54:47,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:54:47,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-28 08:54:47,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:47,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:47,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:47,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:54:47,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:47,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:54:47,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:47,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:47,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:47,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:54:47,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:47,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:47,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:47,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:47,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:47,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:54:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:54:47,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843323770] [2020-10-28 08:54:47,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:54:47,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:54:47,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925876392] [2020-10-28 08:54:47,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:54:47,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:54:47,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:54:47,264 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-28 08:54:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:47,380 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2020-10-28 08:54:47,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:54:47,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 08:54:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:47,391 INFO L225 Difference]: With dead ends: 65 [2020-10-28 08:54:47,391 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 08:54:47,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:54:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 08:54:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 08:54:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 08:54:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-28 08:54:47,444 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-28 08:54:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:47,445 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-28 08:54:47,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:54:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-28 08:54:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:54:47,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:47,447 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] [2020-10-28 08:54:47,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:54:47,447 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:47,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1295233002, now seen corresponding path program 1 times [2020-10-28 08:54:47,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:47,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281003168] [2020-10-28 08:54:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:48,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:54:48,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:54:48,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-28 08:54:48,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:48,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:48,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:54:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:54:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:54:48,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:54:48,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:48,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:48,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:48,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:48,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:54:48,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:48,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:48,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:54:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:54:48,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281003168] [2020-10-28 08:54:48,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:54:48,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:54:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761015273] [2020-10-28 08:54:48,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:54:48,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:48,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:54:48,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:54:48,253 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 4 states. [2020-10-28 08:54:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:48,390 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-28 08:54:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:54:48,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 08:54:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:48,391 INFO L225 Difference]: With dead ends: 55 [2020-10-28 08:54:48,392 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:54:48,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:54:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:54:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-28 08:54:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 08:54:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-28 08:54:48,402 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2020-10-28 08:54:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:48,403 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-28 08:54:48,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:54:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-28 08:54:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 08:54:48,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:48,404 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] [2020-10-28 08:54:48,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:54:48,405 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:48,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1785823484, now seen corresponding path program 1 times [2020-10-28 08:54:48,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:48,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462803405] [2020-10-28 08:54:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:48,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:51,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:51,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 08:54:51,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:54:51,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3434 [2020-10-28 08:54:51,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:51,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:54:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:54:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:54:51,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:51,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:51,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:51,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:51,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:51,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:51,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:54:51,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:51,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:51,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 08:54:51,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462803405] [2020-10-28 08:54:51,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:51,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:54:51,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953384263] [2020-10-28 08:54:51,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:54:51,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:51,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:54:51,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:54:51,935 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-10-28 08:54:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:52,144 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-28 08:54:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:54:52,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-28 08:54:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:52,146 INFO L225 Difference]: With dead ends: 63 [2020-10-28 08:54:52,146 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:54:52,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:54:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:54:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-28 08:54:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 08:54:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-28 08:54:52,155 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2020-10-28 08:54:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:52,156 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-28 08:54:52,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:54:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-28 08:54:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:54:52,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:52,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:52,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:54:52,158 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:52,158 INFO L82 PathProgramCache]: Analyzing trace with hash -385887586, now seen corresponding path program 2 times [2020-10-28 08:54:52,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:52,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737107158] [2020-10-28 08:54:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:52,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:52,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:52,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:52,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:53,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:57,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:54:57,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:54:57,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:54:57,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:57,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:57,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:54:57,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:57,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:54:57,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:54:57,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:57,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:57,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:57,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:57,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:54:57,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:57,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 08:54:57,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737107158] [2020-10-28 08:54:57,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:54:57,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:54:57,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927800040] [2020-10-28 08:54:57,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:54:57,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:57,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:54:57,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:54:57,239 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 4 states. [2020-10-28 08:54:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:57,343 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-28 08:54:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:54:57,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 08:54:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:57,345 INFO L225 Difference]: With dead ends: 72 [2020-10-28 08:54:57,345 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 08:54:57,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:54:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 08:54:57,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 08:54:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 08:54:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-28 08:54:57,359 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2020-10-28 08:54:57,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:57,359 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-28 08:54:57,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:54:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-28 08:54:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:54:57,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:57,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:57,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:54:57,363 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:57,364 INFO L82 PathProgramCache]: Analyzing trace with hash 454086652, now seen corresponding path program 1 times [2020-10-28 08:54:57,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:57,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091787506] [2020-10-28 08:54:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:57,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:57,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:02,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:02,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 08:55:02,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:02,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:55:02,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:02,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:55:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:02,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:02,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:02,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:02,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:02,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:02,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:02,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:02,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:02,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:55:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:55:02,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091787506] [2020-10-28 08:55:02,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:02,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:02,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810842846] [2020-10-28 08:55:02,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:02,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:02,469 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-28 08:55:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:02,645 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-10-28 08:55:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:02,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 08:55:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:02,646 INFO L225 Difference]: With dead ends: 74 [2020-10-28 08:55:02,646 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 08:55:02,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 08:55:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-28 08:55:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 08:55:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-28 08:55:02,656 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2020-10-28 08:55:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:02,656 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-28 08:55:02,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-28 08:55:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:55:02,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:02,658 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:55:02,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:55:02,659 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash -369931882, now seen corresponding path program 2 times [2020-10-28 08:55:02,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:02,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569008912] [2020-10-28 08:55:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:02,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:02,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:07,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:07,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:55:07,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:55:07,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:07,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:07,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:07,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:07,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:07,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:07,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:07,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:55:07,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:07,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:07,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 08:55:07,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569008912] [2020-10-28 08:55:07,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:07,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:07,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521843834] [2020-10-28 08:55:07,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:07,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:07,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:07,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:07,795 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-10-28 08:55:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:07,900 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-28 08:55:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:07,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-28 08:55:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:07,903 INFO L225 Difference]: With dead ends: 86 [2020-10-28 08:55:07,903 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 08:55:07,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 08:55:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 08:55:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:55:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-28 08:55:07,918 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 41 [2020-10-28 08:55:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:07,918 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-28 08:55:07,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-28 08:55:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:55:07,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:07,921 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:07,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:55:07,924 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 517474548, now seen corresponding path program 3 times [2020-10-28 08:55:07,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:07,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145035289] [2020-10-28 08:55:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:07,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:07,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:09,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:12,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:12,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:55:12,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:55:12,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:12,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:55:12,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:55:12,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:55:12,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:13,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:13,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:13,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:13,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:13,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:13,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:13,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:13,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:13,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:13,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:13,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 08:55:13,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145035289] [2020-10-28 08:55:13,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:13,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:55:13,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784745059] [2020-10-28 08:55:13,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:55:13,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:55:13,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:13,043 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 7 states. [2020-10-28 08:55:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:13,172 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-10-28 08:55:13,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:55:13,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-28 08:55:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:13,174 INFO L225 Difference]: With dead ends: 86 [2020-10-28 08:55:13,174 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 08:55:13,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 08:55:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-28 08:55:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:55:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-28 08:55:13,182 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2020-10-28 08:55:13,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:13,182 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-28 08:55:13,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:55:13,182 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-28 08:55:13,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:55:13,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:13,184 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:13,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:55:13,184 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:13,185 INFO L82 PathProgramCache]: Analyzing trace with hash 670410894, now seen corresponding path program 4 times [2020-10-28 08:55:13,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:13,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304174200] [2020-10-28 08:55:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:13,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:18,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:55:18,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:18,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:55:18,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:18,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:18,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:55:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:55:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:55:18,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:18,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:18,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:18,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:18,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:18,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:55:18,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:18,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:18,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:18,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:18,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:55:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304174200] [2020-10-28 08:55:18,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:18,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:55:18,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086936264] [2020-10-28 08:55:18,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:55:18,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:18,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:55:18,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:18,336 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 8 states. [2020-10-28 08:55:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:18,494 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2020-10-28 08:55:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:55:18,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-28 08:55:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:18,496 INFO L225 Difference]: With dead ends: 96 [2020-10-28 08:55:18,496 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 08:55:18,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 08:55:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-10-28 08:55:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 08:55:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-28 08:55:18,505 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 49 [2020-10-28 08:55:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:18,505 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-28 08:55:18,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:55:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-28 08:55:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:55:18,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:18,506 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:18,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:55:18,507 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:18,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1171034968, now seen corresponding path program 5 times [2020-10-28 08:55:18,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:18,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264081832] [2020-10-28 08:55:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:23,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:55:23,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:55:23,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:55:23,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:23,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:23,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:23,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:23,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:23,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:23,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:23,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:23,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:23,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:23,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:23,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:23,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:23,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-28 08:55:23,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264081832] [2020-10-28 08:55:23,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:23,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:23,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922526492] [2020-10-28 08:55:23,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:23,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:23,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:23,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:23,619 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 6 states. [2020-10-28 08:55:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:23,711 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-28 08:55:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:23,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 08:55:23,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:23,712 INFO L225 Difference]: With dead ends: 112 [2020-10-28 08:55:23,712 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 08:55:23,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 08:55:23,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-28 08:55:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:55:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-28 08:55:23,720 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2020-10-28 08:55:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:23,721 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-28 08:55:23,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-28 08:55:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 08:55:23,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:23,722 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:23,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:55:23,722 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1122955142, now seen corresponding path program 6 times [2020-10-28 08:55:23,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:23,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919084924] [2020-10-28 08:55:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:23,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:28,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:55:28,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:55:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:55:28,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:28,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:55:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:55:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:55:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:28,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:28,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:28,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:28,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:28,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:28,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:28,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:28,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-10-28 08:55:28,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919084924] [2020-10-28 08:55:28,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:28,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:55:28,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499370973] [2020-10-28 08:55:28,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:55:28,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:28,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:55:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:28,880 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 9 states. [2020-10-28 08:55:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:29,098 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-10-28 08:55:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:55:29,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-28 08:55:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:29,100 INFO L225 Difference]: With dead ends: 108 [2020-10-28 08:55:29,100 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:55:29,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:55:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-28 08:55:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 08:55:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-28 08:55:29,107 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 57 [2020-10-28 08:55:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:29,108 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-28 08:55:29,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:55:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-28 08:55:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:55:29,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:29,109 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:29,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:55:29,109 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1934973344, now seen corresponding path program 7 times [2020-10-28 08:55:29,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:29,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215539233] [2020-10-28 08:55:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:29,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:34,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:55:34,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:55:34,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:55:34,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:34,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:55:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:55:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:55:34,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:34,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:34,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:34,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 08:55:34,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215539233] [2020-10-28 08:55:34,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:34,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:55:34,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963444562] [2020-10-28 08:55:34,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:55:34,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:34,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:55:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:55:34,300 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 10 states. [2020-10-28 08:55:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:34,568 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2020-10-28 08:55:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:55:34,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-28 08:55:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:34,570 INFO L225 Difference]: With dead ends: 118 [2020-10-28 08:55:34,570 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 08:55:34,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:55:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 08:55:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-10-28 08:55:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 08:55:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-28 08:55:34,592 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2020-10-28 08:55:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:34,593 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-28 08:55:34,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:55:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-28 08:55:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:55:34,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:34,594 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:34,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:55:34,594 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:34,595 INFO L82 PathProgramCache]: Analyzing trace with hash -622196678, now seen corresponding path program 8 times [2020-10-28 08:55:34,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:34,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796259920] [2020-10-28 08:55:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:34,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:36,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:39,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:55:39,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:55:39,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 08:55:39,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:39,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:39,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:55:39,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:39,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:55:39,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:39,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:39,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:39,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:39,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:39,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:39,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:39,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:39,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:39,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:39,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 08:55:39,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796259920] [2020-10-28 08:55:39,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:39,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:55:39,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675151804] [2020-10-28 08:55:39,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:55:39,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:39,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:55:39,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:39,734 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 7 states. [2020-10-28 08:55:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:39,847 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-10-28 08:55:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:55:39,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-28 08:55:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:39,848 INFO L225 Difference]: With dead ends: 138 [2020-10-28 08:55:39,849 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 08:55:39,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 08:55:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-28 08:55:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 08:55:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-28 08:55:39,859 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2020-10-28 08:55:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:39,859 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-28 08:55:39,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:55:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-28 08:55:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:55:39,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:39,860 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:39,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:55:39,861 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:39,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1486892696, now seen corresponding path program 9 times [2020-10-28 08:55:39,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:39,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331942075] [2020-10-28 08:55:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:39,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:41,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:44,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:44,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 08:55:44,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:55:44,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:55:44,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:44,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:55:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:55:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:55:44,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:45,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:45,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:45,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:45,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:45,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:55:45,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:45,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:45,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:45,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-28 08:55:45,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331942075] [2020-10-28 08:55:45,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:45,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:55:45,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151065697] [2020-10-28 08:55:45,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:55:45,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:45,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:55:45,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:55:45,041 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 11 states. [2020-10-28 08:55:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:45,284 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2020-10-28 08:55:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:55:45,285 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-28 08:55:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:45,286 INFO L225 Difference]: With dead ends: 130 [2020-10-28 08:55:45,286 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:55:45,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:55:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:55:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-28 08:55:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 08:55:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-28 08:55:45,307 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 71 [2020-10-28 08:55:45,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:45,309 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-28 08:55:45,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:55:45,310 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-28 08:55:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 08:55:45,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:45,313 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:45,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:55:45,313 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:45,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:45,314 INFO L82 PathProgramCache]: Analyzing trace with hash 615187250, now seen corresponding path program 10 times [2020-10-28 08:55:45,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:45,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076611700] [2020-10-28 08:55:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:45,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:48,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:50,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 08:55:50,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:55:50,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:55:50,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:50,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:50,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:55:50,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:50,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:55:50,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:50,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:50,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:50,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:50,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:50,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:50,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:50,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:50,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:50,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:50,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:50,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-28 08:55:50,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076611700] [2020-10-28 08:55:50,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:50,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:55:50,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342520289] [2020-10-28 08:55:50,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:55:50,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:50,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:55:50,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:50,453 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 8 states. [2020-10-28 08:55:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:50,588 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2020-10-28 08:55:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:55:50,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-28 08:55:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:50,589 INFO L225 Difference]: With dead ends: 152 [2020-10-28 08:55:50,589 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:55:50,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:50,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:55:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-28 08:55:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:55:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-28 08:55:50,604 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 77 [2020-10-28 08:55:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:50,604 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-28 08:55:50,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:55:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-28 08:55:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:55:50,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:50,606 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:50,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:55:50,606 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 637266832, now seen corresponding path program 11 times [2020-10-28 08:55:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:50,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680882387] [2020-10-28 08:55:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:50,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:54,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:55,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:55,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:55:55,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:55:55,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:55:55,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:55,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:55,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:55:55,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 08:55:55,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:55:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:55,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:55,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:55,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:55,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:55,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:55,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:55,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:55,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:55,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-28 08:55:55,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680882387] [2020-10-28 08:55:55,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:55,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:55:55,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519347273] [2020-10-28 08:55:55,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:55:55,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:55,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:55:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:55:55,803 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 12 states. [2020-10-28 08:55:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:56,034 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2020-10-28 08:55:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:55:56,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-10-28 08:55:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:56,036 INFO L225 Difference]: With dead ends: 142 [2020-10-28 08:55:56,036 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 08:55:56,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:55:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 08:55:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-10-28 08:55:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 08:55:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-28 08:55:56,043 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 79 [2020-10-28 08:55:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:56,044 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-28 08:55:56,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:55:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-28 08:55:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:55:56,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:56,045 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:56,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:55:56,045 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:56,045 INFO L82 PathProgramCache]: Analyzing trace with hash -96016854, now seen corresponding path program 12 times [2020-10-28 08:55:56,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:56,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356295968] [2020-10-28 08:55:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:56,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:58,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:01,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 08:56:01,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:01,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 08:56:01,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:01,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:56:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:56:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:56:01,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:01,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:01,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:01,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:01,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:01,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:56:01,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:01,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:01,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:01,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:01,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:01,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-28 08:56:01,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356295968] [2020-10-28 08:56:01,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:01,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:56:01,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820212489] [2020-10-28 08:56:01,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:56:01,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:01,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:56:01,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:01,268 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 13 states. [2020-10-28 08:56:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:01,502 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2020-10-28 08:56:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:56:01,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-10-28 08:56:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:01,504 INFO L225 Difference]: With dead ends: 152 [2020-10-28 08:56:01,504 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 08:56:01,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 08:56:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-10-28 08:56:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:56:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-28 08:56:01,513 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 85 [2020-10-28 08:56:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:01,514 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-28 08:56:01,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:56:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-28 08:56:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:56:01,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:01,515 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:01,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:56:01,515 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:01,516 INFO L82 PathProgramCache]: Analyzing trace with hash -579222204, now seen corresponding path program 13 times [2020-10-28 08:56:01,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:01,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689415675] [2020-10-28 08:56:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:01,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:06,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:06,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:56:06,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:06,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 08:56:06,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:06,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:06,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:56:06,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:06,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:56:06,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:06,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:06,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:06,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:06,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:06,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:06,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:06,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:06,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:06,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-28 08:56:06,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689415675] [2020-10-28 08:56:06,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:06,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:56:06,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442764190] [2020-10-28 08:56:06,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:56:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:56:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:06,673 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 9 states. [2020-10-28 08:56:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:06,801 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2020-10-28 08:56:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:56:06,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-10-28 08:56:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:06,802 INFO L225 Difference]: With dead ends: 178 [2020-10-28 08:56:06,802 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 08:56:06,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 08:56:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-28 08:56:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 08:56:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-28 08:56:06,808 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 91 [2020-10-28 08:56:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:06,808 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-28 08:56:06,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:56:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-28 08:56:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 08:56:06,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:06,810 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:06,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:56:06,810 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:06,811 INFO L82 PathProgramCache]: Analyzing trace with hash 698724642, now seen corresponding path program 14 times [2020-10-28 08:56:06,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:06,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131037534] [2020-10-28 08:56:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:06,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:06,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:06,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:11,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:11,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 08:56:11,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:56:11,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:11,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:56:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 08:56:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:56:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:12,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:12,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:12,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:12,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:12,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:12,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:12,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:12,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:12,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:12,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:12,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-28 08:56:12,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131037534] [2020-10-28 08:56:12,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:12,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:56:12,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684593995] [2020-10-28 08:56:12,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:56:12,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:56:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:12,037 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 14 states. [2020-10-28 08:56:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:12,307 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-10-28 08:56:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:56:12,307 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2020-10-28 08:56:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:12,308 INFO L225 Difference]: With dead ends: 164 [2020-10-28 08:56:12,308 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 08:56:12,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 08:56:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-10-28 08:56:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 08:56:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-28 08:56:12,316 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 93 [2020-10-28 08:56:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:12,316 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-28 08:56:12,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:56:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-28 08:56:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:56:12,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:12,321 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:12,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:56:12,321 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:12,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1270467012, now seen corresponding path program 15 times [2020-10-28 08:56:12,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:12,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443000061] [2020-10-28 08:56:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:12,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:17,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:17,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:56:17,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:17,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:56:17,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:17,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:17,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:56:17,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:17,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:56:17,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:17,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:17,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:17,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:17,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:17,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:17,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:17,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:17,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:17,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:17,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:17,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:17,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-28 08:56:17,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443000061] [2020-10-28 08:56:17,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:17,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:56:17,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227815813] [2020-10-28 08:56:17,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:56:17,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:56:17,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:17,460 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 10 states. [2020-10-28 08:56:17,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:17,597 INFO L93 Difference]: Finished difference Result 192 states and 200 transitions. [2020-10-28 08:56:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:56:17,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-10-28 08:56:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:17,599 INFO L225 Difference]: With dead ends: 192 [2020-10-28 08:56:17,599 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 08:56:17,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 08:56:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-28 08:56:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 08:56:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-28 08:56:17,605 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2020-10-28 08:56:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:17,606 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-28 08:56:17,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:56:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-28 08:56:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:56:17,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:17,607 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:17,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:56:17,607 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:17,608 INFO L82 PathProgramCache]: Analyzing trace with hash 179266586, now seen corresponding path program 16 times [2020-10-28 08:56:17,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:17,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878269350] [2020-10-28 08:56:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:17,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:17,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:17,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:22,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:22,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:56:22,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:22,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 08:56:22,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:22,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:56:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 08:56:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:56:22,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:22,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:22,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-28 08:56:22,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878269350] [2020-10-28 08:56:22,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:22,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:56:22,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853044276] [2020-10-28 08:56:22,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:56:22,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:22,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:56:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:56:22,884 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 15 states. [2020-10-28 08:56:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:23,163 INFO L93 Difference]: Finished difference Result 176 states and 185 transitions. [2020-10-28 08:56:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:56:23,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 101 [2020-10-28 08:56:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:23,165 INFO L225 Difference]: With dead ends: 176 [2020-10-28 08:56:23,165 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 08:56:23,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:56:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 08:56:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-28 08:56:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 08:56:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-28 08:56:23,171 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 101 [2020-10-28 08:56:23,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:23,172 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-28 08:56:23,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:56:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-28 08:56:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 08:56:23,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:23,173 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:23,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:56:23,174 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:23,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:23,174 INFO L82 PathProgramCache]: Analyzing trace with hash 117935924, now seen corresponding path program 17 times [2020-10-28 08:56:23,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:23,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943901662] [2020-10-28 08:56:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:23,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:23,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:28,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:28,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 08:56:28,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:28,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-28 08:56:28,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:28,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:28,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:56:28,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 08:56:28,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:56:28,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:28,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:28,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:28,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:28,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:28,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:28,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:28,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:28,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:28,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:28,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:28,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:28,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-10-28 08:56:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943901662] [2020-10-28 08:56:28,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:28,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:56:28,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306131705] [2020-10-28 08:56:28,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:56:28,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:56:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:56:28,491 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 16 states. [2020-10-28 08:56:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:28,789 INFO L93 Difference]: Finished difference Result 186 states and 195 transitions. [2020-10-28 08:56:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:56:28,790 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2020-10-28 08:56:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:28,791 INFO L225 Difference]: With dead ends: 186 [2020-10-28 08:56:28,791 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 08:56:28,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:56:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 08:56:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-10-28 08:56:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 08:56:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-28 08:56:28,798 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 107 [2020-10-28 08:56:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:28,798 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-28 08:56:28,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:56:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-28 08:56:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 08:56:28,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:28,800 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:28,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:56:28,800 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:28,801 INFO L82 PathProgramCache]: Analyzing trace with hash -687259954, now seen corresponding path program 18 times [2020-10-28 08:56:28,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:28,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783189345] [2020-10-28 08:56:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:28,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:28,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:28,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:33,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:33,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 08:56:33,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 08:56:33,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:33,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:56:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:56:33,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:33,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:33,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:33,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:33,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:33,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:33,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:33,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:33,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:33,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-28 08:56:33,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783189345] [2020-10-28 08:56:33,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:33,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:56:33,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289329830] [2020-10-28 08:56:33,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:56:33,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:33,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:56:33,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:33,990 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 11 states. [2020-10-28 08:56:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:34,135 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2020-10-28 08:56:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:56:34,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 113 [2020-10-28 08:56:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:34,138 INFO L225 Difference]: With dead ends: 218 [2020-10-28 08:56:34,138 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 08:56:34,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 08:56:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-28 08:56:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 08:56:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-28 08:56:34,147 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 113 [2020-10-28 08:56:34,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:34,147 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-28 08:56:34,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:56:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-28 08:56:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 08:56:34,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:34,148 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:34,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:56:34,148 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:34,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:34,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1079652308, now seen corresponding path program 19 times [2020-10-28 08:56:34,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:34,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235725717] [2020-10-28 08:56:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:34,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:34,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:34,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:39,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:39,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 08:56:39,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:39,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-28 08:56:39,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:39,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:56:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 08:56:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:56:39,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:39,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:39,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:39,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:39,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:39,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:39,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:56:39,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:39,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:39,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:39,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:39,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:39,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-10-28 08:56:39,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235725717] [2020-10-28 08:56:39,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:39,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:56:39,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694909706] [2020-10-28 08:56:39,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:56:39,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:39,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:56:39,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:56:39,484 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 17 states. [2020-10-28 08:56:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:39,785 INFO L93 Difference]: Finished difference Result 198 states and 207 transitions. [2020-10-28 08:56:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:56:39,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 115 [2020-10-28 08:56:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:39,788 INFO L225 Difference]: With dead ends: 198 [2020-10-28 08:56:39,788 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 08:56:39,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:56:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 08:56:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-10-28 08:56:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 08:56:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-28 08:56:39,796 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 115 [2020-10-28 08:56:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:39,796 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-28 08:56:39,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:56:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-28 08:56:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 08:56:39,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:39,797 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:39,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:56:39,798 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:39,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1855150650, now seen corresponding path program 20 times [2020-10-28 08:56:39,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:39,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66204687] [2020-10-28 08:56:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:39,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:44,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:44,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 08:56:44,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:44,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-28 08:56:44,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:44,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:56:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:56:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:56:44,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:45,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:45,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:45,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:45,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:45,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:45,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:45,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:45,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:45,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:45,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:45,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2020-10-28 08:56:45,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66204687] [2020-10-28 08:56:45,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:45,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:56:45,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812830164] [2020-10-28 08:56:45,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:56:45,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:56:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:56:45,130 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 18 states. [2020-10-28 08:56:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:45,492 INFO L93 Difference]: Finished difference Result 208 states and 217 transitions. [2020-10-28 08:56:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:56:45,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-10-28 08:56:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:45,494 INFO L225 Difference]: With dead ends: 208 [2020-10-28 08:56:45,494 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 08:56:45,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:56:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 08:56:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-28 08:56:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 08:56:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-10-28 08:56:45,505 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 121 [2020-10-28 08:56:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:45,506 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-10-28 08:56:45,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:56:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-10-28 08:56:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 08:56:45,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:45,508 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:45,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:56:45,510 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:45,510 INFO L82 PathProgramCache]: Analyzing trace with hash -922542112, now seen corresponding path program 21 times [2020-10-28 08:56:45,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:45,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104446516] [2020-10-28 08:56:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:45,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:45,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:45,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:50,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:50,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 08:56:50,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:50,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 08:56:50,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:50,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:56:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:50,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:56:50,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:50,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:50,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:50,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:50,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:50,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:56:50,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:50,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2020-10-28 08:56:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104446516] [2020-10-28 08:56:50,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:50,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:56:50,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835806461] [2020-10-28 08:56:50,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:56:50,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:50,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:56:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:50,711 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 12 states. [2020-10-28 08:56:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:50,856 INFO L93 Difference]: Finished difference Result 244 states and 252 transitions. [2020-10-28 08:56:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:56:50,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 127 [2020-10-28 08:56:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:50,858 INFO L225 Difference]: With dead ends: 244 [2020-10-28 08:56:50,858 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 08:56:50,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 08:56:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-28 08:56:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 08:56:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-28 08:56:50,865 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 127 [2020-10-28 08:56:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:50,866 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-28 08:56:50,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:56:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-28 08:56:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 08:56:50,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:50,867 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:50,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:56:50,867 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1235290946, now seen corresponding path program 22 times [2020-10-28 08:56:50,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:50,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958485929] [2020-10-28 08:56:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:50,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:50,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:50,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:55,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:55,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 08:56:55,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:56:55,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 08:56:55,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:55,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:55,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:56:55,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 08:56:55,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:56:55,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:56,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:56,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:56,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:56,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:56,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:56,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:56:56,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:56,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:56,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:56,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:56,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-10-28 08:56:56,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958485929] [2020-10-28 08:56:56,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:56,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:56:56,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163254670] [2020-10-28 08:56:56,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:56:56,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:56:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:56:56,241 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 19 states. [2020-10-28 08:56:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:56,651 INFO L93 Difference]: Finished difference Result 220 states and 229 transitions. [2020-10-28 08:56:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:56:56,651 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 129 [2020-10-28 08:56:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:56,652 INFO L225 Difference]: With dead ends: 220 [2020-10-28 08:56:56,653 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 08:56:56,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:56:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 08:56:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-10-28 08:56:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 08:56:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2020-10-28 08:56:56,667 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 129 [2020-10-28 08:56:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:56,667 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2020-10-28 08:56:56,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:56:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2020-10-28 08:56:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 08:56:56,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:56,669 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:56,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:56:56,669 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash 707269848, now seen corresponding path program 23 times [2020-10-28 08:56:56,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:56,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240666143] [2020-10-28 08:56:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:56,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:56,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:56,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:01,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:01,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 08:57:01,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-28 08:57:01,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:01,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:57:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:57:01,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:01,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:01,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:01,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:01,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:01,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:01,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:57:01,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:01,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:01,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:01,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:01,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:01,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2020-10-28 08:57:02,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240666143] [2020-10-28 08:57:02,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:02,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:57:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572136699] [2020-10-28 08:57:02,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:57:02,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:02,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:57:02,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:02,019 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 13 states. [2020-10-28 08:57:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:02,185 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2020-10-28 08:57:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:57:02,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-10-28 08:57:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:02,187 INFO L225 Difference]: With dead ends: 258 [2020-10-28 08:57:02,187 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 08:57:02,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 08:57:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-28 08:57:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 08:57:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-28 08:57:02,195 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 135 [2020-10-28 08:57:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:02,195 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-28 08:57:02,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:57:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-28 08:57:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 08:57:02,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:02,197 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:02,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:57:02,197 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash -876074058, now seen corresponding path program 24 times [2020-10-28 08:57:02,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:02,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032509627] [2020-10-28 08:57:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:02,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:02,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:02,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:07,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:07,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 08:57:07,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:07,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:57:07,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:07,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:07,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:57:07,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 08:57:07,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:57:07,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:07,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:07,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:07,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:07,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:07,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:07,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:57:07,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:07,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:07,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-10-28 08:57:07,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032509627] [2020-10-28 08:57:07,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:07,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:57:07,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618113271] [2020-10-28 08:57:07,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:57:07,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:07,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:57:07,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:07,546 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 20 states. [2020-10-28 08:57:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:07,905 INFO L93 Difference]: Finished difference Result 232 states and 241 transitions. [2020-10-28 08:57:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:57:07,905 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2020-10-28 08:57:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:07,907 INFO L225 Difference]: With dead ends: 232 [2020-10-28 08:57:07,907 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 08:57:07,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 08:57:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-10-28 08:57:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-28 08:57:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2020-10-28 08:57:07,917 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 137 [2020-10-28 08:57:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:07,917 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2020-10-28 08:57:07,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:57:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2020-10-28 08:57:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 08:57:07,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:07,918 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:07,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:57:07,919 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1796075984, now seen corresponding path program 25 times [2020-10-28 08:57:07,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:07,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216105791] [2020-10-28 08:57:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:07,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:08,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:08,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:12,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:12,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 08:57:12,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:12,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 08:57:12,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:12,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:12,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:57:12,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 08:57:12,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:57:12,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:13,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:13,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:13,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:13,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:13,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:57:13,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:13,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:13,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2020-10-28 08:57:13,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216105791] [2020-10-28 08:57:13,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:13,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:57:13,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824788159] [2020-10-28 08:57:13,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:57:13,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:13,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:57:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:13,328 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 21 states. [2020-10-28 08:57:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:13,763 INFO L93 Difference]: Finished difference Result 242 states and 251 transitions. [2020-10-28 08:57:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:57:13,764 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 143 [2020-10-28 08:57:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:13,765 INFO L225 Difference]: With dead ends: 242 [2020-10-28 08:57:13,765 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 08:57:13,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 08:57:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-10-28 08:57:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 08:57:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-10-28 08:57:13,776 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 143 [2020-10-28 08:57:13,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:13,777 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-10-28 08:57:13,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:57:13,777 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-10-28 08:57:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 08:57:13,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:13,778 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:13,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:57:13,778 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:13,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1835729814, now seen corresponding path program 26 times [2020-10-28 08:57:13,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:13,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213990761] [2020-10-28 08:57:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:13,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:13,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:18,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:18,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 08:57:18,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:18,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-28 08:57:18,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:18,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:57:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:18,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:57:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:19,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:19,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:19,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:19,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:19,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:19,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:19,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:19,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:19,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:19,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2020-10-28 08:57:19,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213990761] [2020-10-28 08:57:19,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:19,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:57:19,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109374398] [2020-10-28 08:57:19,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:57:19,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:57:19,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:57:19,063 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 14 states. [2020-10-28 08:57:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:19,214 INFO L93 Difference]: Finished difference Result 284 states and 292 transitions. [2020-10-28 08:57:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:57:19,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 149 [2020-10-28 08:57:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:19,217 INFO L225 Difference]: With dead ends: 284 [2020-10-28 08:57:19,217 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 08:57:19,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:57:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 08:57:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-28 08:57:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 08:57:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2020-10-28 08:57:19,225 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 149 [2020-10-28 08:57:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:19,225 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2020-10-28 08:57:19,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:57:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2020-10-28 08:57:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 08:57:19,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:19,226 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:19,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:57:19,226 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:19,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1550010680, now seen corresponding path program 27 times [2020-10-28 08:57:19,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:19,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202576271] [2020-10-28 08:57:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:19,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:19,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:24,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:24,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 08:57:24,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:24,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:57:24,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:24,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:57:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 08:57:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:57:24,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:24,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:24,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:24,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:24,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:24,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:24,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:24,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:24,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:24,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2020-10-28 08:57:24,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202576271] [2020-10-28 08:57:24,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:24,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:57:24,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964541351] [2020-10-28 08:57:24,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:57:24,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:24,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:57:24,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:57:24,630 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 22 states. [2020-10-28 08:57:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:25,010 INFO L93 Difference]: Finished difference Result 254 states and 263 transitions. [2020-10-28 08:57:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:57:25,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 151 [2020-10-28 08:57:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:25,012 INFO L225 Difference]: With dead ends: 254 [2020-10-28 08:57:25,012 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 08:57:25,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:57:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 08:57:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-28 08:57:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 08:57:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-10-28 08:57:25,021 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 151 [2020-10-28 08:57:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:25,021 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-10-28 08:57:25,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:57:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-10-28 08:57:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-28 08:57:25,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:25,022 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:25,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:57:25,023 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash 837674850, now seen corresponding path program 28 times [2020-10-28 08:57:25,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:25,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500786241] [2020-10-28 08:57:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:25,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:25,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:25,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:30,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-28 08:57:30,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:30,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:57:30,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:30,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:57:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:57:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:30,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:30,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:30,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:30,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:30,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:30,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:30,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:30,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2020-10-28 08:57:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500786241] [2020-10-28 08:57:30,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:30,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:57:30,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429234691] [2020-10-28 08:57:30,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:57:30,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:30,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:57:30,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:57:30,265 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 15 states. [2020-10-28 08:57:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:30,436 INFO L93 Difference]: Finished difference Result 298 states and 306 transitions. [2020-10-28 08:57:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:57:30,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 157 [2020-10-28 08:57:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:30,439 INFO L225 Difference]: With dead ends: 298 [2020-10-28 08:57:30,439 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 08:57:30,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:57:30,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 08:57:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-10-28 08:57:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 08:57:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2020-10-28 08:57:30,447 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 157 [2020-10-28 08:57:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:30,448 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2020-10-28 08:57:30,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:57:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2020-10-28 08:57:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 08:57:30,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:30,449 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:30,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:57:30,449 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1975280576, now seen corresponding path program 29 times [2020-10-28 08:57:30,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:30,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842895904] [2020-10-28 08:57:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:30,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:35,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 08:57:35,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:35,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 08:57:35,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:35,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:57:35,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 08:57:35,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:57:35,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:35,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:35,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:35,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:35,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:35,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:57:35,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:35,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:35,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:35,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:35,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:35,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2020-10-28 08:57:35,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842895904] [2020-10-28 08:57:35,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:35,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:57:35,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049717112] [2020-10-28 08:57:35,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:57:35,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:35,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:57:35,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:57:35,915 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 23 states. [2020-10-28 08:57:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:36,353 INFO L93 Difference]: Finished difference Result 266 states and 275 transitions. [2020-10-28 08:57:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:57:36,353 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 159 [2020-10-28 08:57:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:36,355 INFO L225 Difference]: With dead ends: 266 [2020-10-28 08:57:36,355 INFO L226 Difference]: Without dead ends: 173 [2020-10-28 08:57:36,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:57:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-28 08:57:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-10-28 08:57:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 08:57:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2020-10-28 08:57:36,369 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 159 [2020-10-28 08:57:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:36,369 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2020-10-28 08:57:36,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:57:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2020-10-28 08:57:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 08:57:36,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:36,371 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:36,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:57:36,371 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:36,371 INFO L82 PathProgramCache]: Analyzing trace with hash -526271910, now seen corresponding path program 30 times [2020-10-28 08:57:36,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:36,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702072172] [2020-10-28 08:57:36,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:36,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:36,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:41,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-28 08:57:41,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:41,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5213 [2020-10-28 08:57:41,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:41,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:41,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:57:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 08:57:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:57:41,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:42,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:42,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:42,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:42,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:57:42,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:42,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2020-10-28 08:57:42,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702072172] [2020-10-28 08:57:42,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:42,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:57:42,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524911683] [2020-10-28 08:57:42,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:57:42,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:42,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:57:42,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:57:42,056 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 24 states. [2020-10-28 08:57:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:42,564 INFO L93 Difference]: Finished difference Result 276 states and 285 transitions. [2020-10-28 08:57:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:57:42,565 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 165 [2020-10-28 08:57:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:42,567 INFO L225 Difference]: With dead ends: 276 [2020-10-28 08:57:42,567 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 08:57:42,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:57:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 08:57:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2020-10-28 08:57:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-28 08:57:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2020-10-28 08:57:42,575 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 165 [2020-10-28 08:57:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:42,576 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2020-10-28 08:57:42,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:57:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2020-10-28 08:57:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 08:57:42,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:42,577 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:42,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:57:42,578 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:42,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1992166028, now seen corresponding path program 31 times [2020-10-28 08:57:42,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:42,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250637349] [2020-10-28 08:57:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:42,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:42,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:42,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:47,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 08:57:47,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:47,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:57:47,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:47,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:57:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:47,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:57:47,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:47,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:47,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:47,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:47,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:47,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:47,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:47,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:47,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:47,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:47,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:47,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2020-10-28 08:57:47,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250637349] [2020-10-28 08:57:47,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:47,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:57:47,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152606819] [2020-10-28 08:57:47,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:57:47,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:47,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:57:47,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:57:47,862 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 16 states. [2020-10-28 08:57:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:48,055 INFO L93 Difference]: Finished difference Result 324 states and 332 transitions. [2020-10-28 08:57:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:57:48,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 171 [2020-10-28 08:57:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:48,057 INFO L225 Difference]: With dead ends: 324 [2020-10-28 08:57:48,057 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 08:57:48,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:57:48,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 08:57:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2020-10-28 08:57:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-28 08:57:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-10-28 08:57:48,069 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 171 [2020-10-28 08:57:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:48,070 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-10-28 08:57:48,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:57:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-10-28 08:57:48,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 08:57:48,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:48,072 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:48,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:57:48,072 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:48,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1385723218, now seen corresponding path program 32 times [2020-10-28 08:57:48,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:48,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327783953] [2020-10-28 08:57:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:48,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:48,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:53,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-28 08:57:53,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:53,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-28 08:57:53,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:53,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:53,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:57:53,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:57:53,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:57:53,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:53,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:53,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:53,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:53,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:53,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:53,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:53,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:53,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:53,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:53,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:53,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1051 trivial. 0 not checked. [2020-10-28 08:57:53,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327783953] [2020-10-28 08:57:53,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:53,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:57:53,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189400770] [2020-10-28 08:57:53,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:57:53,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:53,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:57:53,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:57:53,704 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 25 states. [2020-10-28 08:57:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:54,219 INFO L93 Difference]: Finished difference Result 288 states and 297 transitions. [2020-10-28 08:57:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:57:54,220 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 173 [2020-10-28 08:57:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:54,221 INFO L225 Difference]: With dead ends: 288 [2020-10-28 08:57:54,221 INFO L226 Difference]: Without dead ends: 187 [2020-10-28 08:57:54,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:57:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-28 08:57:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2020-10-28 08:57:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-28 08:57:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-10-28 08:57:54,231 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 173 [2020-10-28 08:57:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:54,231 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-10-28 08:57:54,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:57:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-10-28 08:57:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-28 08:57:54,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:54,232 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:57:54,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:57:54,233 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash 737826412, now seen corresponding path program 33 times [2020-10-28 08:57:54,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:54,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908326766] [2020-10-28 08:57:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:54,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:54,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:54,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:59,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:59,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-28 08:57:59,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:57:59,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 08:57:59,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:59,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:59,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:57:59,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 08:57:59,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 08:57:59,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:59,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:59,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:59,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:59,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:59,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:59,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:57:59,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:59,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:59,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:59,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:59,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:59,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1621 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1137 trivial. 0 not checked. [2020-10-28 08:57:59,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908326766] [2020-10-28 08:57:59,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:59,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:57:59,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082944187] [2020-10-28 08:57:59,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:57:59,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:57:59,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:57:59,827 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 26 states. [2020-10-28 08:58:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:00,364 INFO L93 Difference]: Finished difference Result 298 states and 307 transitions. [2020-10-28 08:58:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:58:00,365 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 179 [2020-10-28 08:58:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:00,366 INFO L225 Difference]: With dead ends: 298 [2020-10-28 08:58:00,366 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 08:58:00,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:58:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 08:58:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2020-10-28 08:58:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-28 08:58:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2020-10-28 08:58:00,379 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 179 [2020-10-28 08:58:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:00,379 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2020-10-28 08:58:00,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:58:00,380 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2020-10-28 08:58:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-28 08:58:00,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:00,381 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:00,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:58:00,382 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:00,382 INFO L82 PathProgramCache]: Analyzing trace with hash -346735610, now seen corresponding path program 34 times [2020-10-28 08:58:00,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:00,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875983252] [2020-10-28 08:58:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:05,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-28 08:58:05,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:58:05,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5182 [2020-10-28 08:58:05,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:05,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:05,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:58:05,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:05,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:58:05,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:05,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:05,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:05,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:05,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:05,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:05,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:05,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:05,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:05,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:05,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:05,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1756 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2020-10-28 08:58:05,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875983252] [2020-10-28 08:58:05,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:05,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:58:05,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574218133] [2020-10-28 08:58:05,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:58:05,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:05,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:58:05,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:58:05,851 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 17 states. [2020-10-28 08:58:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:06,037 INFO L93 Difference]: Finished difference Result 350 states and 358 transitions. [2020-10-28 08:58:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:58:06,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 185 [2020-10-28 08:58:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:06,039 INFO L225 Difference]: With dead ends: 350 [2020-10-28 08:58:06,039 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 08:58:06,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:58:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 08:58:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2020-10-28 08:58:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 08:58:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2020-10-28 08:58:06,049 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 185 [2020-10-28 08:58:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:06,050 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2020-10-28 08:58:06,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:58:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2020-10-28 08:58:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-28 08:58:06,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:06,051 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:06,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:58:06,051 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:06,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1814536036, now seen corresponding path program 35 times [2020-10-28 08:58:06,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:06,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925037068] [2020-10-28 08:58:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:06,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:06,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:06,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5241 [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:58:11,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:11,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:11,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:11,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:11,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:11,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:11,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:11,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:11,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:11,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:11,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:11,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:11,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2020-10-28 08:58:11,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925037068] [2020-10-28 08:58:11,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:11,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:58:11,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375156277] [2020-10-28 08:58:11,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:58:11,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:58:11,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:58:11,865 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 27 states. [2020-10-28 08:58:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:12,342 INFO L93 Difference]: Finished difference Result 310 states and 319 transitions. [2020-10-28 08:58:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:58:12,342 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 187 [2020-10-28 08:58:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:12,344 INFO L225 Difference]: With dead ends: 310 [2020-10-28 08:58:12,344 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 08:58:12,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:58:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 08:58:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-10-28 08:58:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-28 08:58:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2020-10-28 08:58:12,352 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 187 [2020-10-28 08:58:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:12,353 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2020-10-28 08:58:12,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:58:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2020-10-28 08:58:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-28 08:58:12,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:12,354 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:12,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:58:12,355 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:12,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1563317506, now seen corresponding path program 36 times [2020-10-28 08:58:12,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:12,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315099546] [2020-10-28 08:58:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:12,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:12,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:12,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:17,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:17,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 08:58:17,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:58:17,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5254 [2020-10-28 08:58:17,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:17,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:58:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:58:17,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:17,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:17,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:17,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:17,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:17,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:17,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:58:17,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:17,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:17,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2020-10-28 08:58:17,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315099546] [2020-10-28 08:58:17,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:17,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:58:17,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040887599] [2020-10-28 08:58:17,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:58:17,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:58:17,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:58:17,887 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand 18 states. [2020-10-28 08:58:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:18,095 INFO L93 Difference]: Finished difference Result 364 states and 372 transitions. [2020-10-28 08:58:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:58:18,096 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 193 [2020-10-28 08:58:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:18,097 INFO L225 Difference]: With dead ends: 364 [2020-10-28 08:58:18,097 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 08:58:18,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:58:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 08:58:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-10-28 08:58:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 08:58:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2020-10-28 08:58:18,106 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 193 [2020-10-28 08:58:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:18,106 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2020-10-28 08:58:18,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:58:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2020-10-28 08:58:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-28 08:58:18,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:18,107 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:18,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:58:18,108 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:18,108 INFO L82 PathProgramCache]: Analyzing trace with hash 431083612, now seen corresponding path program 37 times [2020-10-28 08:58:18,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:18,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414716334] [2020-10-28 08:58:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:18,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:18,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:18,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:23,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:23,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-28 08:58:23,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:58:23,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5153 [2020-10-28 08:58:23,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:23,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:23,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:58:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:58:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:58:23,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:23,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:23,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:23,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:23,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:23,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:23,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:23,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:23,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:23,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:23,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:23,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1377 trivial. 0 not checked. [2020-10-28 08:58:23,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414716334] [2020-10-28 08:58:23,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:23,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:58:23,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659492873] [2020-10-28 08:58:23,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:58:23,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:23,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:58:23,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:58:23,866 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 28 states. [2020-10-28 08:58:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:24,462 INFO L93 Difference]: Finished difference Result 322 states and 331 transitions. [2020-10-28 08:58:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:58:24,463 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 195 [2020-10-28 08:58:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:24,464 INFO L225 Difference]: With dead ends: 322 [2020-10-28 08:58:24,465 INFO L226 Difference]: Without dead ends: 209 [2020-10-28 08:58:24,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:58:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-28 08:58:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-10-28 08:58:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-28 08:58:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2020-10-28 08:58:24,474 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 195 [2020-10-28 08:58:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:24,475 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2020-10-28 08:58:24,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:58:24,475 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2020-10-28 08:58:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-28 08:58:24,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:24,476 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:24,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:58:24,477 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:24,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1569390090, now seen corresponding path program 38 times [2020-10-28 08:58:24,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:24,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235483441] [2020-10-28 08:58:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:24,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:24,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:24,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:29,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:29,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-28 08:58:29,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:58:29,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5250 [2020-10-28 08:58:29,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:29,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:29,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 08:58:29,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:58:29,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 08:58:29,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:30,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:30,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:30,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:30,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:30,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:30,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:30,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:30,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:30,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1475 trivial. 0 not checked. [2020-10-28 08:58:30,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235483441] [2020-10-28 08:58:30,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:30,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:58:30,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74307577] [2020-10-28 08:58:30,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:58:30,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:30,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:58:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:58:30,377 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand 29 states. [2020-10-28 08:58:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:30,993 INFO L93 Difference]: Finished difference Result 332 states and 341 transitions. [2020-10-28 08:58:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:58:30,993 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 201 [2020-10-28 08:58:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:30,995 INFO L225 Difference]: With dead ends: 332 [2020-10-28 08:58:30,995 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 08:58:30,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:58:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 08:58:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-10-28 08:58:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-28 08:58:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2020-10-28 08:58:31,006 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 201 [2020-10-28 08:58:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:31,007 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2020-10-28 08:58:31,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:58:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2020-10-28 08:58:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-28 08:58:31,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:31,008 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:31,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:58:31,009 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:31,010 INFO L82 PathProgramCache]: Analyzing trace with hash 677042192, now seen corresponding path program 39 times [2020-10-28 08:58:31,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:31,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403040210] [2020-10-28 08:58:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:31,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking...