/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=DEEPEST --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-fpi/ms1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:38:56,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:38:56,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:38:56,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:38:56,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:38:56,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:38:56,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:38:56,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:38:56,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:38:56,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:38:56,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:38:56,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:38:56,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:38:56,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:38:56,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:38:56,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:38:56,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:38:56,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:38:56,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:38:56,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:38:56,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:38:56,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:38:56,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:38:56,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:38:56,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:38:56,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:38:56,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:38:56,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:38:56,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:38:56,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:38:56,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:38:56,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:38:56,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:38:56,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:38:56,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:38:56,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:38:56,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:38:56,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:38:56,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:38:56,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:38:56,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:38:57,000 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 [2020-10-27 14:38:57,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:38:57,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:38:57,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:38:57,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:38:57,036 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:38:57,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:38:57,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:38:57,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:38:57,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:38:57,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:38:57,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:38:57,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:38:57,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:38:57,038 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:38:57,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:38:57,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:38:57,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:38:57,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:38:57,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:38:57,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:38:57,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:38:57,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:38:57,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:38:57,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:38:57,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:38:57,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:38:57,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:38:57,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:38:57,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:38:57,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:38:57,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:38:57,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:38:57,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:38:57,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:38:57,525 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:38:57,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1.c [2020-10-27 14:38:57,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c903a017/837b22ab4c714e37b2b047dec6c1f786/FLAG4b5307e64 [2020-10-27 14:38:58,238 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:38:58,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms1.c [2020-10-27 14:38:58,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c903a017/837b22ab4c714e37b2b047dec6c1f786/FLAG4b5307e64 [2020-10-27 14:38:58,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c903a017/837b22ab4c714e37b2b047dec6c1f786 [2020-10-27 14:38:58,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:38:58,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:38:58,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:38:58,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:38:58,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:38:58,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:38:58" (1/1) ... [2020-10-27 14:38:58,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4751cb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58, skipping insertion in model container [2020-10-27 14:38:58,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:38:58" (1/1) ... [2020-10-27 14:38:58,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:38:58,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:38:58,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:38:58,847 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:38:58,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:38:58,890 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:38:58,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58 WrapperNode [2020-10-27 14:38:58,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:38:58,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:38:58,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:38:58,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:38:58,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58" (1/1) ... [2020-10-27 14:38:58,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58" (1/1) ... [2020-10-27 14:38:58,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58" (1/1) ... [2020-10-27 14:38:58,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58" (1/1) ... [2020-10-27 14:38:58,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58" (1/1) ... [2020-10-27 14:38:58,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58" (1/1) ... [2020-10-27 14:38:58,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58" (1/1) ... [2020-10-27 14:38:58,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:38:58,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:38:58,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:38:58,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:38:58,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58" (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 [2020-10-27 14:38:59,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:38:59,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:38:59,079 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:38:59,079 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:38:59,080 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:38:59,080 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:38:59,080 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:38:59,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:38:59,080 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:38:59,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:38:59,081 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:38:59,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:38:59,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:38:59,081 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:38:59,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:38:59,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:38:59,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:38:59,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:38:59,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:38:59,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:38:59,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:38:59,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:38:59,423 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:38:59,423 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:38:59,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:38:59 BoogieIcfgContainer [2020-10-27 14:38:59,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:38:59,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:38:59,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:38:59,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:38:59,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:38:58" (1/3) ... [2020-10-27 14:38:59,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376231e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:38:59, skipping insertion in model container [2020-10-27 14:38:59,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:58" (2/3) ... [2020-10-27 14:38:59,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376231e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:38:59, skipping insertion in model container [2020-10-27 14:38:59,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:38:59" (3/3) ... [2020-10-27 14:38:59,435 INFO L111 eAbstractionObserver]: Analyzing ICFG ms1.c [2020-10-27 14:38:59,449 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:38:59,455 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:38:59,471 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:38:59,502 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:38:59,503 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:38:59,503 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:38:59,503 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:38:59,503 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:38:59,503 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:38:59,503 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:38:59,504 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:38:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 14:38:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:38:59,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:59,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:59,553 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:59,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-10-27 14:38:59,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:59,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534678641] [2020-10-27 14:38:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:59,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:59,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:00,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:00,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:00,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:39:00,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:39:00,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-27 14:39:00,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:00,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:39:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:00,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:39:00,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:00,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:00,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:00,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:00,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:00,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 14:39:00,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:00,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:00,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:00,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:00,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:00,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:00,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:00,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:00,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:00,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:39:00,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:39:00,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:00,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:00,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:39:00,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:00,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:00,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534678641] [2020-10-27 14:39:00,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:00,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:39:00,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249966312] [2020-10-27 14:39:00,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:39:00,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:00,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:39:00,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:39:00,564 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-27 14:39:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:00,703 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-27 14:39:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:39:00,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-27 14:39:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:00,714 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:39:00,714 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 14:39:00,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:39:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 14:39:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 14:39:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 14:39:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 14:39:00,766 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-10-27 14:39:00,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:00,766 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 14:39:00,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:39:00,767 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 14:39:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:39:00,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:00,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:00,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:39:00,769 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:00,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1173980304, now seen corresponding path program 1 times [2020-10-27 14:39:00,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:00,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137369564] [2020-10-27 14:39:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:00,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:01,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:39:01,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:39:01,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 14:39:01,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:01,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:39:01,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:39:01,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:39:01,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:01,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:01,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:01,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:01,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:39:01,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:01,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:01,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:01,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:01,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:01,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:01,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:01,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:01,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:39:01,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:39:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:39:01,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:01,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137369564] [2020-10-27 14:39:01,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:01,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:39:01,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224830511] [2020-10-27 14:39:01,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:39:01,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:01,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:39:01,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:39:01,204 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-27 14:39:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:01,379 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-27 14:39:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:39:01,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 14:39:01,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:01,381 INFO L225 Difference]: With dead ends: 39 [2020-10-27 14:39:01,381 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 14:39:01,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:39:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 14:39:01,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 14:39:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 14:39:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 14:39:01,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-27 14:39:01,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:01,392 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 14:39:01,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:39:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 14:39:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:39:01,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:01,394 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] [2020-10-27 14:39:01,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:39:01,394 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-10-27 14:39:01,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:01,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657718703] [2020-10-27 14:39:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:01,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:39:01,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 14:39:01,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:39:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:39:01,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:39:01,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:01,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:01,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:01,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:01,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:39:01,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:01,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:01,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:01,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:01,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:01,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:01,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:01,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:01,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:01,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:01,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:01,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657718703] [2020-10-27 14:39:01,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:01,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 14:39:01,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339633182] [2020-10-27 14:39:01,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:39:01,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:01,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:39:01,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:39:01,754 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-27 14:39:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:01,957 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 14:39:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:39:01,958 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 14:39:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:01,959 INFO L225 Difference]: With dead ends: 38 [2020-10-27 14:39:01,959 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:39:01,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:39:01,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:39:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-27 14:39:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:39:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 14:39:01,968 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-27 14:39:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:01,968 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 14:39:01,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:39:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 14:39:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:39:01,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:01,970 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] [2020-10-27 14:39:01,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:39:01,970 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:01,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:01,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1995813591, now seen corresponding path program 1 times [2020-10-27 14:39:01,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:01,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189887866] [2020-10-27 14:39:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:02,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:39:02,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:39:02,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-27 14:39:02,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:39:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:39:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:39:02,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:02,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:02,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:02,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:02,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:02,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:39:02,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:02,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:02,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:02,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:02,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:39:02,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:02,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:02,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:02,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:02,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:39:02,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:02,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:02,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:02,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:02,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189887866] [2020-10-27 14:39:02,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:02,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:39:02,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599928007] [2020-10-27 14:39:02,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:39:02,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:39:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:39:02,872 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-27 14:39:02,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:02,961 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-27 14:39:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:39:02,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 14:39:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:02,962 INFO L225 Difference]: With dead ends: 44 [2020-10-27 14:39:02,962 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:39:02,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:39:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:39:02,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 14:39:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:39:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 14:39:02,976 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2020-10-27 14:39:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:02,977 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 14:39:02,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:39:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 14:39:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:39:02,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:02,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:02,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:39:02,980 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1207722736, now seen corresponding path program 1 times [2020-10-27 14:39:02,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:02,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356377498] [2020-10-27 14:39:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:03,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:05,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:39:05,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:39:05,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2534 [2020-10-27 14:39:05,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:05,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:39:05,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:05,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:39:05,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:05,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:05,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:05,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:05,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:05,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:39:05,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:05,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:05,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:05,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:05,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:05,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:05,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:05,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:05,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:39:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:05,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356377498] [2020-10-27 14:39:05,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:05,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:39:05,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586369718] [2020-10-27 14:39:05,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:39:05,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:05,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:39:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:39:05,856 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 14 states. [2020-10-27 14:39:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:06,420 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-27 14:39:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:39:06,421 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-27 14:39:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:06,422 INFO L225 Difference]: With dead ends: 45 [2020-10-27 14:39:06,422 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 14:39:06,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:39:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 14:39:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-27 14:39:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:39:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-27 14:39:06,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-10-27 14:39:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:06,431 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-27 14:39:06,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:39:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-27 14:39:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:39:06,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:06,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:06,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:39:06,433 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:06,434 INFO L82 PathProgramCache]: Analyzing trace with hash 773864071, now seen corresponding path program 2 times [2020-10-27 14:39:06,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:06,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763721311] [2020-10-27 14:39:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:06,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:08,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:11,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:39:11,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:39:11,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:39:11,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:11,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:39:11,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:11,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:39:11,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:11,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:11,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:11,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:11,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:11,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:39:11,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:11,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:11,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:11,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:11,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:11,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:11,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:39:11,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:11,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:39:11,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763721311] [2020-10-27 14:39:11,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:11,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:39:11,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283452889] [2020-10-27 14:39:11,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:39:11,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:11,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:39:11,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:39:11,704 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2020-10-27 14:39:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:12,025 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-27 14:39:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:39:12,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 14:39:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:12,027 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:39:12,027 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:39:12,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:39:12,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:39:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-27 14:39:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:39:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-27 14:39:12,044 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-10-27 14:39:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:12,044 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-27 14:39:12,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:39:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-27 14:39:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:39:12,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:12,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:12,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:39:12,046 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:12,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:12,048 INFO L82 PathProgramCache]: Analyzing trace with hash -433053015, now seen corresponding path program 3 times [2020-10-27 14:39:12,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:12,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15347997] [2020-10-27 14:39:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:12,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:12,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:12,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:12,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:12,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:12,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:17,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:17,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:39:17,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:39:17,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:39:17,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:17,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:39:17,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:17,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:39:17,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:17,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:17,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:17,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:17,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:17,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:39:17,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:17,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:17,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:17,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:17,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:17,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:17,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:17,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:17,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:17,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:17,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:17,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:17,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:17,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:17,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:17,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15347997] [2020-10-27 14:39:17,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:17,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:39:17,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220060635] [2020-10-27 14:39:17,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:39:17,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:17,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:39:17,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:39:17,730 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 18 states. [2020-10-27 14:39:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:19,226 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-27 14:39:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:39:19,227 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-27 14:39:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:19,229 INFO L225 Difference]: With dead ends: 50 [2020-10-27 14:39:19,229 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:39:19,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:39:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:39:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-10-27 14:39:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:39:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 14:39:19,240 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 35 [2020-10-27 14:39:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:19,240 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 14:39:19,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:39:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 14:39:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:39:19,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:19,242 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:19,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:39:19,242 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1842075536, now seen corresponding path program 4 times [2020-10-27 14:39:19,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:19,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832963364] [2020-10-27 14:39:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:19,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:20,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:20,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:21,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:39:21,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:39:21,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2641 [2020-10-27 14:39:21,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:21,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:39:21,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:39:21,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:39:21,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:39:21,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:21,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:21,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:21,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:21,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:39:21,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:21,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:21,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:21,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:21,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:21,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:21,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:21,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:21,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:21,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:21,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:21,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:39:21,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832963364] [2020-10-27 14:39:21,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:21,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:39:21,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687456242] [2020-10-27 14:39:21,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:39:21,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:21,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:39:21,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:39:21,990 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 6 states. [2020-10-27 14:39:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:22,097 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-27 14:39:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:39:22,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-27 14:39:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:22,099 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:39:22,099 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:39:22,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:39:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:39:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 14:39:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:39:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 14:39:22,113 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2020-10-27 14:39:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:22,116 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 14:39:22,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:39:22,116 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 14:39:22,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:39:22,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:22,117 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-27 14:39:22,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:39:22,118 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:22,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2100240974, now seen corresponding path program 5 times [2020-10-27 14:39:22,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:22,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091971488] [2020-10-27 14:39:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:22,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:27,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:39:27,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:39:27,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:39:27,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:27,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:39:27,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:27,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:39:27,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:27,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:27,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:27,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:27,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:27,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:39:27,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:27,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:27,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:27,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:27,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:27,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:27,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:27,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:27,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:27,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:27,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:27,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:39:27,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091971488] [2020-10-27 14:39:27,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:27,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:39:27,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314693634] [2020-10-27 14:39:27,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:39:27,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:27,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:39:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:39:27,293 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 10 states. [2020-10-27 14:39:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:27,508 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-27 14:39:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:39:27,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-27 14:39:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:27,509 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:39:27,510 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:39:27,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:39:27,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:39:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 14:39:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:39:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 14:39:27,526 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-27 14:39:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:27,527 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 14:39:27,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:39:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 14:39:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:39:27,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:27,528 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 14:39:27,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:39:27,531 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:27,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1797980308, now seen corresponding path program 6 times [2020-10-27 14:39:27,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:27,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922885607] [2020-10-27 14:39:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:27,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:32,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:32,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:39:32,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:39:32,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:39:32,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:39:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:39:32,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:32,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:32,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:32,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:32,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:32,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:32,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:39:32,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:32,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:32,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:32,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:32,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:32,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:32,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:32,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:32,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:32,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:32,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:32,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:32,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:32,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:32,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:32,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:39:32,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922885607] [2020-10-27 14:39:32,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:32,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:39:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771309075] [2020-10-27 14:39:32,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:39:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:39:32,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:39:32,936 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-10-27 14:39:33,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:33,617 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-27 14:39:33,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:39:33,618 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 14:39:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:33,620 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:39:33,620 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:39:33,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:39:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:39:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-27 14:39:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:39:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-27 14:39:33,628 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-27 14:39:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:33,628 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-27 14:39:33,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:39:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-27 14:39:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:39:33,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:33,629 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:33,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:39:33,630 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1517817098, now seen corresponding path program 7 times [2020-10-27 14:39:33,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:33,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312437459] [2020-10-27 14:39:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:33,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:33,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:37,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:37,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:39:37,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:39:37,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3503 [2020-10-27 14:39:37,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:37,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:39:37,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:39:37,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:39:37,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:38,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:38,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:38,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:38,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:38,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:39:38,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:38,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:38,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:38,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:38,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:38,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:38,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:38,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:38,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:38,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:38,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:38,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:38,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:38,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:38,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312437459] [2020-10-27 14:39:38,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:38,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:39:38,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9535049] [2020-10-27 14:39:38,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:39:38,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:39:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:39:38,179 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2020-10-27 14:39:38,775 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-27 14:39:39,136 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2020-10-27 14:39:39,293 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-27 14:39:39,436 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-27 14:39:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:40,179 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-10-27 14:39:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:39:40,180 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-27 14:39:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:40,182 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:39:40,182 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:39:40,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:39:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:39:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 14:39:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 14:39:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-27 14:39:40,204 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2020-10-27 14:39:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:40,204 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-27 14:39:40,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:39:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-27 14:39:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:39:40,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:40,205 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:40,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:39:40,206 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:40,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:40,206 INFO L82 PathProgramCache]: Analyzing trace with hash 974327885, now seen corresponding path program 8 times [2020-10-27 14:39:40,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:40,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469438493] [2020-10-27 14:39:40,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:40,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:43,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:45,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:45,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:39:45,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:39:45,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:39:45,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:45,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:39:45,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:45,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:39:45,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:45,782 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 31 [2020-10-27 14:39:46,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:46,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:46,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:46,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:46,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:46,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:46,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:46,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:46,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:46,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:46,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:46,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:46,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:46,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:46,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:46,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:46,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:46,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:46,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469438493] [2020-10-27 14:39:46,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:46,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:39:46,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113376932] [2020-10-27 14:39:46,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:39:46,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:46,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:39:46,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:39:46,657 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 26 states. [2020-10-27 14:39:47,518 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-27 14:39:48,015 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-27 14:39:48,303 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 14:39:48,828 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-27 14:39:49,066 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-27 14:39:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:49,383 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-27 14:39:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:39:49,383 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-27 14:39:49,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:49,384 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:39:49,384 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 14:39:49,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:39:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 14:39:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 14:39:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:39:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 14:39:49,395 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2020-10-27 14:39:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:49,395 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 14:39:49,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:39:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 14:39:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:39:49,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:49,397 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:49,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:39:49,397 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:49,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:49,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1913889322, now seen corresponding path program 9 times [2020-10-27 14:39:49,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:49,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655464165] [2020-10-27 14:39:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:49,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:49,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:49,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:49,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:49,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:50,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:50,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:50,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:50,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:51,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:52,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:54,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 14:39:54,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 14:39:54,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:39:54,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:54,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:39:54,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:54,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:39:54,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:54,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:54,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:54,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:54,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:54,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:54,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:54,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:54,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:54,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:54,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:54,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:54,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 38 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:54,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655464165] [2020-10-27 14:39:54,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:54,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:39:54,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675877592] [2020-10-27 14:39:54,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:39:54,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:54,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:39:54,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:39:54,585 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 15 states. [2020-10-27 14:39:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:54,902 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-27 14:39:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:39:54,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 14:39:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:54,904 INFO L225 Difference]: With dead ends: 79 [2020-10-27 14:39:54,904 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:39:54,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:39:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:39:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 14:39:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:39:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-27 14:39:54,917 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-27 14:39:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:54,917 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-27 14:39:54,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:39:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-27 14:39:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:39:54,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:54,919 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:54,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:39:54,919 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash -527027768, now seen corresponding path program 10 times [2020-10-27 14:39:54,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:54,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170946279] [2020-10-27 14:39:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:54,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:59,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:59,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:39:59,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:39:59,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:39:59,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:59,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:39:59,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:59,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:39:59,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:00,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:00,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:00,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:00,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:00,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:00,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:00,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:00,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:00,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:00,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:00,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:00,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:00,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:00,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:00,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:00,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:40:00,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170946279] [2020-10-27 14:40:00,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:00,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:40:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155591877] [2020-10-27 14:40:00,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:40:00,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:40:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:40:00,315 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-10-27 14:40:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:01,658 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-27 14:40:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:40:01,658 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-10-27 14:40:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:01,660 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:40:01,660 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:40:01,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:40:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:40:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-27 14:40:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:40:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 14:40:01,672 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-27 14:40:01,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:01,672 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 14:40:01,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:40:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 14:40:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:40:01,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:01,674 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:01,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:40:01,674 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:01,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1196207642, now seen corresponding path program 11 times [2020-10-27 14:40:01,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:01,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991534183] [2020-10-27 14:40:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:01,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:01,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:02,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:03,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:06,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:06,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:40:06,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:40:06,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:40:06,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:06,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:40:06,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:40:06,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:40:06,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:07,466 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2020-10-27 14:40:07,625 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 40 [2020-10-27 14:40:07,801 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 41 [2020-10-27 14:40:08,031 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 36 [2020-10-27 14:40:08,260 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 40 [2020-10-27 14:40:08,595 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2020-10-27 14:40:09,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:09,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:09,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:09,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:09,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:09,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:09,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:09,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:09,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:09,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:09,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:09,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:09,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:09,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:09,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:09,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:09,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:09,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:09,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:09,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:09,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:40:09,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991534183] [2020-10-27 14:40:09,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:09,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:40:09,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928607135] [2020-10-27 14:40:09,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:40:09,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:09,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:40:09,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:40:09,254 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 30 states. [2020-10-27 14:40:10,486 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2020-10-27 14:40:11,172 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-10-27 14:40:11,488 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-10-27 14:40:11,728 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-27 14:40:11,929 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 14:40:12,113 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-27 14:40:12,799 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-27 14:40:13,155 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-27 14:40:13,502 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 14:40:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:13,593 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-10-27 14:40:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:40:13,594 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 52 [2020-10-27 14:40:13,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:13,595 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:40:13,595 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:40:13,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=438, Invalid=2532, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 14:40:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:40:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 14:40:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:40:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-27 14:40:13,606 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2020-10-27 14:40:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:13,606 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-27 14:40:13,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:40:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-27 14:40:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:40:13,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:13,607 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:13,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:40:13,608 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:13,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:13,608 INFO L82 PathProgramCache]: Analyzing trace with hash 222645745, now seen corresponding path program 12 times [2020-10-27 14:40:13,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:13,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177441848] [2020-10-27 14:40:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:13,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:13,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:13,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:15,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:15,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:15,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:16,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:18,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:18,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:40:18,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:40:18,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:40:18,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:40:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:40:18,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:19,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:19,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:19,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:19,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:19,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:19,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:19,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:19,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:19,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:19,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:19,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:19,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:19,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:19,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:19,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:19,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:19,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:19,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:19,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 3 proven. 101 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:40:19,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177441848] [2020-10-27 14:40:19,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:19,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:40:19,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999450642] [2020-10-27 14:40:19,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:40:19,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:40:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:40:19,108 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 22 states. [2020-10-27 14:40:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:20,580 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-27 14:40:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:40:20,581 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-27 14:40:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:20,582 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:40:20,582 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 14:40:20,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=328, Invalid=1478, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:40:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 14:40:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-27 14:40:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:40:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-27 14:40:20,592 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-27 14:40:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:20,592 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-27 14:40:20,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:40:20,592 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-27 14:40:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:40:20,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:20,593 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:20,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:40:20,593 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:20,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:20,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1920102253, now seen corresponding path program 13 times [2020-10-27 14:40:20,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:20,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257020955] [2020-10-27 14:40:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:20,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:21,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:22,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:22,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:24,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:25,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:25,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:40:25,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:40:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:40:25,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:40:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:40:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:40:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:26,686 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 43 [2020-10-27 14:40:26,936 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 46 [2020-10-27 14:40:27,334 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2020-10-27 14:40:27,493 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-27 14:40:27,801 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-10-27 14:40:28,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:28,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:28,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:28,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:28,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:28,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:28,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:28,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:28,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:28,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:28,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:28,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:28,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:28,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:28,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:28,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:28,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:28,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:28,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:28,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:28,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:28,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 40 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:40:28,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257020955] [2020-10-27 14:40:28,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:28,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:40:28,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585693636] [2020-10-27 14:40:28,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:40:28,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:28,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:40:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:40:28,624 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 34 states. [2020-10-27 14:40:30,232 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 97 [2020-10-27 14:40:30,934 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 92 [2020-10-27 14:40:31,318 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-27 14:40:31,827 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2020-10-27 14:40:32,109 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-27 14:40:32,514 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-10-27 14:40:32,720 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 14:40:33,038 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-27 14:40:33,405 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-27 14:40:33,982 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-10-27 14:40:34,451 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-10-27 14:40:34,838 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-27 14:40:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:34,920 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-10-27 14:40:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:40:34,921 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 57 [2020-10-27 14:40:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:34,922 INFO L225 Difference]: With dead ends: 68 [2020-10-27 14:40:34,922 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 14:40:34,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=548, Invalid=3234, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 14:40:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 14:40:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 14:40:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:40:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-27 14:40:34,939 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2020-10-27 14:40:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:34,939 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-27 14:40:34,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:40:34,939 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-27 14:40:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:40:34,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:34,940 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:34,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:40:34,940 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash -290917340, now seen corresponding path program 14 times [2020-10-27 14:40:34,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:34,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755495012] [2020-10-27 14:40:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:35,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:35,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:35,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:35,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:35,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:35,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:36,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:36,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:36,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:39,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:39,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:40:39,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:40:39,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:40:39,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:39,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:40:39,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:39,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:40:39,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:40,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:40,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:40,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:40,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:40,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:40,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:40,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:40,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:40,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:40,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:40,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:40,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:40,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:40,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:40,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:40,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:40,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 30 proven. 109 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:40:40,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755495012] [2020-10-27 14:40:40,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:40,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:40:40,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708116528] [2020-10-27 14:40:40,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:40:40,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:40,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:40:40,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:40:40,838 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 27 states. [2020-10-27 14:40:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:42,554 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-27 14:40:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:40:42,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-27 14:40:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:42,555 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:40:42,555 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:40:42,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=597, Invalid=2483, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 14:40:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:40:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-27 14:40:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:40:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-27 14:40:42,566 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-27 14:40:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:42,566 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-27 14:40:42,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:40:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-27 14:40:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:40:42,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:42,567 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:42,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:40:42,567 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash 262866626, now seen corresponding path program 15 times [2020-10-27 14:40:42,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:42,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985440728] [2020-10-27 14:40:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:42,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:43,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:44,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:44,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:47,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:40:47,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:40:47,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:40:47,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:47,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:40:47,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:40:47,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:40:47,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:48,428 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-27 14:40:48,650 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 42 [2020-10-27 14:40:48,934 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 51 [2020-10-27 14:40:49,398 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2020-10-27 14:40:49,604 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-10-27 14:40:49,938 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-27 14:40:50,254 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-27 14:40:50,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:50,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:50,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:50,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:50,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:50,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:50,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:50,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:50,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:50,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:50,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:50,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:50,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:50,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:50,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:50,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:50,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:50,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:50,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:50,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:50,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:50,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 53 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:40:50,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985440728] [2020-10-27 14:40:50,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:50,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:40:50,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623836372] [2020-10-27 14:40:50,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:40:50,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:50,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:40:50,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:40:50,935 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 38 states. [2020-10-27 14:40:52,990 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 101 [2020-10-27 14:40:54,144 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2020-10-27 14:40:54,635 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 112 [2020-10-27 14:40:55,299 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 103 [2020-10-27 14:40:55,766 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-27 14:40:56,298 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2020-10-27 14:40:56,686 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-27 14:40:57,117 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-10-27 14:40:57,406 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 14:40:57,736 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-27 14:40:57,947 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 14:40:58,208 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-27 14:40:58,857 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2020-10-27 14:40:59,373 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2020-10-27 14:41:00,051 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 102 [2020-10-27 14:41:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:00,149 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-27 14:41:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:41:00,150 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 62 [2020-10-27 14:41:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:00,151 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:41:00,152 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:41:00,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=670, Invalid=4022, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 14:41:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:41:00,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-27 14:41:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:41:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-27 14:41:00,163 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2020-10-27 14:41:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:00,163 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-27 14:41:00,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:41:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-27 14:41:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:41:00,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:00,164 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:00,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:41:00,165 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:00,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1859839083, now seen corresponding path program 16 times [2020-10-27 14:41:00,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:00,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385469851] [2020-10-27 14:41:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:00,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:05,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:05,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:41:05,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:41:05,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:41:05,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:05,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:41:05,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:41:05,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:41:05,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:05,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:05,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:05,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:05,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:05,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:05,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:41:05,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:05,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:05,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:05,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:05,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:05,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:05,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:05,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:05,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:05,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:05,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:05,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:05,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:41:05,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385469851] [2020-10-27 14:41:05,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:05,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:41:05,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393170593] [2020-10-27 14:41:05,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:41:05,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:05,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:41:05,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:41:05,504 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-10-27 14:41:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:06,056 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-10-27 14:41:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:41:06,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-27 14:41:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:06,059 INFO L225 Difference]: With dead ends: 107 [2020-10-27 14:41:06,059 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:41:06,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:41:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:41:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-27 14:41:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:41:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-27 14:41:06,074 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2020-10-27 14:41:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:06,074 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-27 14:41:06,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:41:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-27 14:41:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:41:06,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:06,076 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:06,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:41:06,077 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:06,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2042889289, now seen corresponding path program 17 times [2020-10-27 14:41:06,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:06,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274665399] [2020-10-27 14:41:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:06,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:07,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:11,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:41:11,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:41:11,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 14:41:11,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:41:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:41:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:41:11,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:12,301 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-27 14:41:12,469 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-27 14:41:12,909 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 47 [2020-10-27 14:41:13,117 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 50 [2020-10-27 14:41:13,354 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 55 [2020-10-27 14:41:13,540 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2020-10-27 14:41:13,889 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2020-10-27 14:41:14,157 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 45 [2020-10-27 14:41:14,399 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 45 [2020-10-27 14:41:14,685 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2020-10-27 14:41:16,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:16,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:16,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:16,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:16,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:16,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:41:16,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:16,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:16,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:16,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:16,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:16,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:16,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:16,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:16,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:16,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:16,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:16,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:16,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:16,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:16,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:16,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 68 proven. 129 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:41:16,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274665399] [2020-10-27 14:41:16,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:16,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:41:16,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122478069] [2020-10-27 14:41:16,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:41:16,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:16,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:41:16,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:41:16,493 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 42 states. [2020-10-27 14:41:18,145 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-27 14:41:19,244 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 120 [2020-10-27 14:41:20,382 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 119 [2020-10-27 14:41:21,031 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 128 [2020-10-27 14:41:21,678 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 117 [2020-10-27 14:41:22,111 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-27 14:41:22,547 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 105 [2020-10-27 14:41:22,891 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-27 14:41:23,254 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 99 [2020-10-27 14:41:23,547 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 14:41:23,840 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-10-27 14:41:24,052 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 14:41:24,287 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-27 14:41:24,950 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-27 14:41:25,556 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 125 [2020-10-27 14:41:26,250 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 127 [2020-10-27 14:41:26,801 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 14:41:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:26,902 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-10-27 14:41:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 14:41:26,903 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 67 [2020-10-27 14:41:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:26,904 INFO L225 Difference]: With dead ends: 78 [2020-10-27 14:41:26,904 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:41:26,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=804, Invalid=4896, Unknown=0, NotChecked=0, Total=5700 [2020-10-27 14:41:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:41:26,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 14:41:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:41:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-27 14:41:26,916 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 67 [2020-10-27 14:41:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:26,916 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-27 14:41:26,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:41:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-27 14:41:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 14:41:26,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:26,917 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:26,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:41:26,917 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1072629376, now seen corresponding path program 18 times [2020-10-27 14:41:26,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:26,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159501268] [2020-10-27 14:41:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:26,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:31,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:31,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:41:31,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:41:31,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:41:31,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:31,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:41:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:41:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:41:31,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:33,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:33,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:33,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:33,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:33,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:33,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:33,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:33,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:33,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:33,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:33,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:33,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:33,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:33,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:41:33,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:33,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:33,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:33,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:33,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 30 proven. 194 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:41:33,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159501268] [2020-10-27 14:41:33,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:33,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:41:33,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090038369] [2020-10-27 14:41:33,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:41:33,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:33,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:41:33,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:41:33,064 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 32 states. [2020-10-27 14:41:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:35,668 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2020-10-27 14:41:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 14:41:35,670 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-27 14:41:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:35,671 INFO L225 Difference]: With dead ends: 115 [2020-10-27 14:41:35,671 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:41:35,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=789, Invalid=3633, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 14:41:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:41:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-27 14:41:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:41:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-27 14:41:35,682 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-27 14:41:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:35,683 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-27 14:41:35,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:41:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-27 14:41:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:41:35,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:35,684 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:35,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:41:35,684 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:35,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2144801890, now seen corresponding path program 19 times [2020-10-27 14:41:35,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:35,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880221634] [2020-10-27 14:41:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:36,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:38,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:39,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:40,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:40,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 14:41:40,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:41:40,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:41:40,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 14:41:40,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:41:40,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 14:41:40,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:42,120 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-27 14:41:42,356 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2020-10-27 14:41:42,630 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 51 [2020-10-27 14:41:42,902 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 57 [2020-10-27 14:41:43,484 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-10-27 14:41:43,825 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 54 [2020-10-27 14:41:44,844 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 56 [2020-10-27 14:41:45,158 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 50 [2020-10-27 14:41:45,527 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 56 [2020-10-27 14:41:45,775 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 46 [2020-10-27 14:41:46,216 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-10-27 14:41:46,619 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 41 [2020-10-27 14:41:46,915 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2020-10-27 14:41:47,230 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2020-10-27 14:41:47,460 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 34 [2020-10-27 14:41:47,737 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2020-10-27 14:41:47,979 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2020-10-27 14:41:48,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:48,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:48,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:48,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:48,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:48,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:48,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:48,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:48,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:48,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:48,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:48,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:48,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:48,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:48,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:48,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:41:48,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:48,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 85 proven. 159 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:41:48,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880221634] [2020-10-27 14:41:48,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:48,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 14:41:48,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116428184] [2020-10-27 14:41:48,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 14:41:48,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:48,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 14:41:48,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1863, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:41:48,934 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 46 states. [2020-10-27 14:41:49,589 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 14:41:49,832 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 14:41:50,088 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-27 14:41:50,345 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-27 14:41:50,622 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-27 14:41:50,920 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-27 14:41:51,215 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-27 14:41:51,489 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-27 14:41:51,715 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-27 14:41:52,794 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 131 [2020-10-27 14:41:54,418 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 145 [2020-10-27 14:41:55,911 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 160 DAG size of output: 151 [2020-10-27 14:41:57,457 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 158 DAG size of output: 148 [2020-10-27 14:41:58,238 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 119 [2020-10-27 14:41:59,515 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 150 DAG size of output: 140 [2020-10-27 14:42:00,169 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2020-10-27 14:42:01,206 WARN L193 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 132 [2020-10-27 14:42:01,747 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-27 14:42:02,601 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 114 [2020-10-27 14:42:02,979 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-27 14:42:03,573 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2020-10-27 14:42:03,886 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-27 14:42:04,327 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-10-27 14:42:04,563 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-27 14:42:04,905 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-10-27 14:42:06,204 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 143 [2020-10-27 14:42:07,380 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 145 [2020-10-27 14:42:08,798 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 150 DAG size of output: 147 [2020-10-27 14:42:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:08,924 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-10-27 14:42:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 14:42:08,926 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 72 [2020-10-27 14:42:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:08,927 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:42:08,927 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:42:08,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=955, Invalid=5851, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 14:42:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:42:08,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-27 14:42:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:42:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-27 14:42:08,939 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2020-10-27 14:42:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:08,939 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-27 14:42:08,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 14:42:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-27 14:42:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:42:08,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:08,940 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:08,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:42:08,941 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1536211257, now seen corresponding path program 20 times [2020-10-27 14:42:08,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:08,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316763486] [2020-10-27 14:42:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:08,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:09,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:09,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:09,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:09,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:09,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:10,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:10,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:11,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:12,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:13,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:42:13,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:42:13,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:42:13,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:13,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:42:13,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:42:13,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 14:42:13,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:14,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:14,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:14,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:14,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:14,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:42:14,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:14,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:14,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:14,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:14,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:14,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:14,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:14,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:14,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:14,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:14,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:14,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:42:14,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316763486] [2020-10-27 14:42:14,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:14,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:42:14,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508073980] [2020-10-27 14:42:14,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:42:14,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:14,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:42:14,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:42:14,824 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 28 states. [2020-10-27 14:42:15,978 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-27 14:42:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:18,005 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-10-27 14:42:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:42:18,006 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-10-27 14:42:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:18,007 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:42:18,008 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:42:18,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 14:42:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:42:18,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-27 14:42:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:42:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-27 14:42:18,018 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2020-10-27 14:42:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:18,018 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-27 14:42:18,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:42:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-27 14:42:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:42:18,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:18,019 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:18,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:42:18,019 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:18,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:18,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1341085403, now seen corresponding path program 21 times [2020-10-27 14:42:18,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:18,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915657436] [2020-10-27 14:42:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:18,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:19,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:21,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:23,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:23,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:23,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:42:23,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:42:23,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5611 [2020-10-27 14:42:23,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 14:42:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:42:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:42:23,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:25,942 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-27 14:42:26,250 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-27 14:42:26,818 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 55 [2020-10-27 14:42:27,237 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 59 [2020-10-27 14:42:28,090 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 64 [2020-10-27 14:42:28,540 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 55 [2020-10-27 14:42:29,403 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 60 [2020-10-27 14:42:29,751 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 51 [2020-10-27 14:42:30,602 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 56 [2020-10-27 14:42:31,030 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 48 [2020-10-27 14:42:31,614 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2020-10-27 14:42:31,944 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 43 [2020-10-27 14:42:32,512 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 46 [2020-10-27 14:42:32,836 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 37 [2020-10-27 14:42:33,174 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-10-27 14:42:33,638 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 42 [2020-10-27 14:42:35,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:35,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:35,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:35,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:35,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:35,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:42:35,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:35,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:35,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:35,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:35,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:35,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:35,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:35,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:35,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:35,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:35,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:35,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:35,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 104 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:42:35,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915657436] [2020-10-27 14:42:35,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:35,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 14:42:35,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223098662] [2020-10-27 14:42:35,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 14:42:35,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:35,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 14:42:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 14:42:35,188 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 50 states. [2020-10-27 14:42:35,955 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-27 14:42:36,227 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67