/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/s1lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:40:34,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:40:34,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:40:34,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:40:34,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:40:34,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:40:34,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:40:34,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:40:34,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:40:34,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:40:34,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:40:34,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:40:34,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:40:34,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:40:34,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:40:34,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:40:34,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:40:34,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:40:34,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:40:34,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:40:34,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:40:34,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:40:34,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:40:34,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:40:34,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:40:34,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:40:34,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:40:34,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:40:34,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:40:34,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:40:34,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:40:34,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:40:34,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:40:34,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:40:34,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:40:34,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:40:34,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:40:34,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:40:34,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:40:34,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:40:34,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:40:34,883 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 14:40:34,926 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:40:34,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:40:34,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:40:34,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:40:34,931 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:40:34,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:40:34,931 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:40:34,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:40:34,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:40:34,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:40:34,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:40:34,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:40:34,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:40:34,934 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:40:34,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:40:34,934 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:40:34,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:40:34,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:40:34,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:40:34,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:40:34,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:40:34,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:40:34,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:40:34,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:40:34,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:40:34,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:40:34,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:40:34,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:40:34,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:40:34,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:40:35,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:40:35,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:40:35,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:40:35,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:40:35,371 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:40:35,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1lif.c [2020-10-27 14:40:35,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b278d1e46/25d2bf261e1b450a8e4f39489514cacc/FLAGf3aa67624 [2020-10-27 14:40:36,064 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:40:36,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s1lif.c [2020-10-27 14:40:36,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b278d1e46/25d2bf261e1b450a8e4f39489514cacc/FLAGf3aa67624 [2020-10-27 14:40:36,428 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b278d1e46/25d2bf261e1b450a8e4f39489514cacc [2020-10-27 14:40:36,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:40:36,437 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:40:36,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:40:36,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:40:36,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:40:36,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:40:36" (1/1) ... [2020-10-27 14:40:36,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@739d7ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36, skipping insertion in model container [2020-10-27 14:40:36,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:40:36" (1/1) ... [2020-10-27 14:40:36,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:40:36,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:40:36,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:40:36,663 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:40:36,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:40:36,728 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:40:36,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36 WrapperNode [2020-10-27 14:40:36,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:40:36,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:40:36,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:40:36,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:40:36,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36" (1/1) ... [2020-10-27 14:40:36,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36" (1/1) ... [2020-10-27 14:40:36,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36" (1/1) ... [2020-10-27 14:40:36,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36" (1/1) ... [2020-10-27 14:40:36,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36" (1/1) ... [2020-10-27 14:40:36,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36" (1/1) ... [2020-10-27 14:40:36,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36" (1/1) ... [2020-10-27 14:40:36,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:40:36,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:40:36,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:40:36,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:40:36,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36" (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 14:40:36,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:40:36,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:40:36,930 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:40:36,931 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:40:36,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:40:36,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:40:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:40:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:40:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:40:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:40:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:40:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:40:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:40:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:40:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:40:36,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:40:36,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:40:36,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:40:36,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:40:36,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:40:36,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:40:36,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:40:37,499 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:40:37,499 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:40:37,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:40:37 BoogieIcfgContainer [2020-10-27 14:40:37,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:40:37,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:40:37,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:40:37,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:40:37,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:40:36" (1/3) ... [2020-10-27 14:40:37,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2aff96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:40:37, skipping insertion in model container [2020-10-27 14:40:37,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:40:36" (2/3) ... [2020-10-27 14:40:37,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2aff96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:40:37, skipping insertion in model container [2020-10-27 14:40:37,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:40:37" (3/3) ... [2020-10-27 14:40:37,532 INFO L111 eAbstractionObserver]: Analyzing ICFG s1lif.c [2020-10-27 14:40:37,545 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:40:37,550 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:40:37,563 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:40:37,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:40:37,591 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:40:37,591 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:40:37,591 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:40:37,591 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:40:37,591 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:40:37,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:40:37,591 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:40:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-27 14:40:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:40:37,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:37,615 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] [2020-10-27 14:40:37,616 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-27 14:40:37,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:37,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156739343] [2020-10-27 14:40:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:37,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:37,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:37,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:38,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:38,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:38,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:40:38,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:40:38,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-27 14:40:38,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:38,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:40:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:38,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:40:38,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:38,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:38,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:38,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:38,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:38,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 14:40:38,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:38,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:38,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:38,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:38,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:40:38,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:38,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:38,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:38,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:38,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:38,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:40:38,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:40:38,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:38,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:38,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:40:38,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:38,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:40:38,804 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 14:40:38,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156739343] [2020-10-27 14:40:38,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:40:38,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:40:38,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909205597] [2020-10-27 14:40:38,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:40:38,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:38,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:40:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:40:38,834 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-27 14:40:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:39,004 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-27 14:40:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:40:39,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-27 14:40:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:39,022 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:40:39,022 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:40:39,025 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 14:40:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:40:39,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 14:40:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:40:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 14:40:39,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-27 14:40:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:39,069 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 14:40:39,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:40:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 14:40:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:40:39,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:39,071 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] [2020-10-27 14:40:39,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:40:39,072 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:39,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1793608214, now seen corresponding path program 1 times [2020-10-27 14:40:39,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:39,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804698927] [2020-10-27 14:40:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:39,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:39,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:39,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:39,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:39,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:40:39,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:40:39,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-27 14:40:39,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:39,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:40:39,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:40:39,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:40:39,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 14:40:39,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:39,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:39,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:39,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:39,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:40:39,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:39,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:39,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:39,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:39,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:39,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:39,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:39,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:40:39,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:39,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:40:39,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:40:39,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:39,684 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 14:40:39,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804698927] [2020-10-27 14:40:39,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:40:39,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:40:39,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581961148] [2020-10-27 14:40:39,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:40:39,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:40:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:40:39,691 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-27 14:40:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:39,905 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-27 14:40:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:40:39,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:40:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:39,907 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:40:39,907 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:40:39,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:40:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:40:39,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 14:40:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:40:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 14:40:39,918 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-27 14:40:39,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:39,918 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 14:40:39,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:40:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 14:40:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:40:39,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:39,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:39,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:40:39,920 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:39,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-27 14:40:39,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:39,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011222884] [2020-10-27 14:40:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:39,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:41,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:41,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:41,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:43,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:43,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:40:43,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:40:43,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3222 [2020-10-27 14:40:43,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:43,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:40:43,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:43,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:40:43,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:43,526 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2020-10-27 14:40:44,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:44,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:44,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:44,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:44,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:44,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:40:44,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:44,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:44,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:44,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:44,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:44,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:44,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:44,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:44,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:44,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:44,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:44,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:44,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:44,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:44,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:44,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:40:44,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011222884] [2020-10-27 14:40:44,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:44,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:40:44,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026276994] [2020-10-27 14:40:44,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:40:44,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:40:44,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:40:44,040 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 16 states. [2020-10-27 14:40:44,296 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-10-27 14:40:45,340 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-27 14:40:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:45,610 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-27 14:40:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:40:45,614 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-27 14:40:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:45,615 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:40:45,615 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:40:45,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:40:45,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:40:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-27 14:40:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:40:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 14:40:45,632 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-10-27 14:40:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:45,632 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 14:40:45,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:40:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 14:40:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:40:45,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:45,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:45,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:40:45,634 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:45,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-27 14:40:45,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:45,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587597773] [2020-10-27 14:40:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:45,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:45,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:45,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:46,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:46,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:46,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:40:46,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:40:46,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-27 14:40:46,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:46,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:40:46,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:40:46,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:40:46,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:40:47,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:47,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:47,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:47,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:47,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:40:47,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:47,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:47,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:47,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:47,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:47,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:47,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:47,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:47,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:47,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:47,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:47,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:47,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:47,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:47,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:40:47,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587597773] [2020-10-27 14:40:47,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:47,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:40:47,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518691009] [2020-10-27 14:40:47,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:40:47,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:47,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:40:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:40:47,051 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-27 14:40:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:47,568 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-27 14:40:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:40:47,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:40:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:47,570 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:40:47,570 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:40:47,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:40:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:40:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-10-27 14:40:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:40:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-27 14:40:47,581 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2020-10-27 14:40:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:47,582 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-27 14:40:47,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:40:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-27 14:40:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:40:47,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:47,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:47,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:40:47,584 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-27 14:40:47,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:47,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613692934] [2020-10-27 14:40:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:47,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:47,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:48,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:40:48,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:40:48,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-27 14:40:48,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:48,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:40:48,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:40:48,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:40:48,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:48,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:48,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:48,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:48,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:48,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:48,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:48,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:48,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:48,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:48,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:48,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:48,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:48,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:48,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:48,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:48,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:40:48,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613692934] [2020-10-27 14:40:48,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:48,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:40:48,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984370135] [2020-10-27 14:40:48,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:40:48,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:40:48,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:40:48,359 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 8 states. [2020-10-27 14:40:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:48,613 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2020-10-27 14:40:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:40:48,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 14:40:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:48,615 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:40:48,615 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:40:48,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:40:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:40:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-27 14:40:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:40:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-27 14:40:48,626 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2020-10-27 14:40:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:48,626 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-27 14:40:48,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:40:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-27 14:40:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:40:48,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:48,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:48,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:40:48,628 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:48,628 INFO L82 PathProgramCache]: Analyzing trace with hash 234001266, now seen corresponding path program 1 times [2020-10-27 14:40:48,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:48,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515419327] [2020-10-27 14:40:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:48,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:49,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:52,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:52,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:40:52,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:40:52,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4138 [2020-10-27 14:40:52,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:40:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:40:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:40:52,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:52,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:52,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:52,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:52,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:52,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:52,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:40:52,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:52,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:52,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:52,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:52,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:52,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:52,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:52,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:52,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:52,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:52,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:52,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:52,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:52,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:52,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:40:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:40:52,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515419327] [2020-10-27 14:40:52,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:52,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:40:52,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134695860] [2020-10-27 14:40:52,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:40:52,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:52,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:40:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:40:52,880 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 8 states. [2020-10-27 14:40:53,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:53,145 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-27 14:40:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:40:53,145 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 14:40:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:53,146 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:40:53,147 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:40:53,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:40:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:40:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-27 14:40:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:40:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 14:40:53,155 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-10-27 14:40:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:53,156 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 14:40:53,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:40:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 14:40:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:40:53,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:53,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:53,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:40:53,157 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:53,159 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 3 times [2020-10-27 14:40:53,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:53,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171847964] [2020-10-27 14:40:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:53,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:53,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:53,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:53,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:54,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:54,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:54,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:55,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:55,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:56,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:56,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:56,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:57,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:58,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:58,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:58,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:40:58,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:40:58,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-27 14:40:58,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:40:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:40:58,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:59,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:59,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:59,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:59,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:59,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:59,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:40:59,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:59,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:59,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:59,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:59,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:59,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:59,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:59,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:59,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:59,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:59,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:40:59,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171847964] [2020-10-27 14:40:59,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:59,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:40:59,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728395779] [2020-10-27 14:40:59,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:40:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:40:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:40:59,449 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 21 states. [2020-10-27 14:41:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:01,082 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-27 14:41:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:41:01,083 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2020-10-27 14:41:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:01,085 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:41:01,085 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 14:41:01,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:41:01,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 14:41:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-27 14:41:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:41:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 14:41:01,103 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-27 14:41:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:01,104 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 14:41:01,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:41:01,104 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 14:41:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:41:01,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:01,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:01,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:41:01,108 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:01,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 2 times [2020-10-27 14:41:01,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:01,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572445626] [2020-10-27 14:41:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:01,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:03,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:04,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:04,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:04,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:41:04,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:41:04,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3459 [2020-10-27 14:41:04,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:04,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:41:04,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:41:04,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:41:04,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:04,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:04,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:04,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:04,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:04,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:04,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:41:04,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:04,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:04,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:04,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:04,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:04,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:04,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:04,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:04,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:04,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:04,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:04,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:04,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:04,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:04,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:04,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:41:04,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572445626] [2020-10-27 14:41:04,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:04,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:41:04,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246079721] [2020-10-27 14:41:04,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:41:04,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:04,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:41:04,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:41:04,845 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 13 states. [2020-10-27 14:41:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:05,647 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-27 14:41:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:41:05,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 14:41:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:05,650 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:41:05,650 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:41:05,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:41:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:41:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-27 14:41:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 14:41:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-27 14:41:05,662 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 38 [2020-10-27 14:41:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:05,663 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-27 14:41:05,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:41:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-27 14:41:05,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:41:05,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:05,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:05,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:41:05,664 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:05,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 3 times [2020-10-27 14:41:05,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:05,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527903650] [2020-10-27 14:41:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:05,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:05,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:08,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:41:08,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:41:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2926 [2020-10-27 14:41:08,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:41:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:41:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:41:08,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:08,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:08,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:08,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:08,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:08,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:41:08,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:08,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:08,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:08,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:08,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:41:08,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:08,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:08,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:08,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:08,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:08,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:08,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:08,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:08,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:08,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:41:08,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527903650] [2020-10-27 14:41:08,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:08,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:41:08,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437131373] [2020-10-27 14:41:08,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:41:08,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:08,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:41:08,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:41:08,861 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 12 states. [2020-10-27 14:41:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:09,399 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-27 14:41:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:41:09,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 14:41:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:09,402 INFO L225 Difference]: With dead ends: 74 [2020-10-27 14:41:09,402 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:41:09,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:41:09,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:41:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 14:41:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:41:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-27 14:41:09,415 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 38 [2020-10-27 14:41:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:09,415 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-27 14:41:09,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:41:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-27 14:41:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:41:09,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:09,416 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:09,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:41:09,416 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 4 times [2020-10-27 14:41:09,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:09,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433824797] [2020-10-27 14:41:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:09,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:09,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:10,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:41:10,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:41:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882 [2020-10-27 14:41:10,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:41:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:41:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:41:10,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:10,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:10,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:10,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:10,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:10,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:10,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:10,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:10,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:10,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:10,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:10,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:10,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:10,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:41:10,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433824797] [2020-10-27 14:41:10,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:10,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:41:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897388091] [2020-10-27 14:41:10,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:41:10,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:41:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:41:10,425 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-10-27 14:41:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:10,743 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-10-27 14:41:10,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:41:10,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 14:41:10,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:10,747 INFO L225 Difference]: With dead ends: 135 [2020-10-27 14:41:10,747 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:41:10,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 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 14:41:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:41:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-10-27 14:41:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:41:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-27 14:41:10,763 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 40 [2020-10-27 14:41:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:10,763 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-27 14:41:10,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:41:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-27 14:41:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:41:10,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:10,764 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:10,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:41:10,764 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:10,765 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 5 times [2020-10-27 14:41:10,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:10,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660554353] [2020-10-27 14:41:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:10,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:12,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:12,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:12,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:13,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:14,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:14,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:15,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:15,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:15,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:15,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:15,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:15,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:41:15,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 14:41:15,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:41:15,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:15,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:41:15,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:41:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:41:15,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:16,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:16,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:16,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:16,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:16,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:16,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:41:16,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:16,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:16,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:16,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:16,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:16,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:16,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:16,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:16,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:16,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:16,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:16,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:16,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:41:16,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660554353] [2020-10-27 14:41:16,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:16,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:41:16,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119806748] [2020-10-27 14:41:16,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:41:16,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:41:16,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:41:16,046 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 16 states. [2020-10-27 14:41:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:17,745 INFO L93 Difference]: Finished difference Result 168 states and 202 transitions. [2020-10-27 14:41:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:41:17,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 14:41:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:17,748 INFO L225 Difference]: With dead ends: 168 [2020-10-27 14:41:17,749 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:41:17,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=1943, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:41:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:41:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 66. [2020-10-27 14:41:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:41:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-27 14:41:17,765 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 43 [2020-10-27 14:41:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:17,766 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-27 14:41:17,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:41:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-27 14:41:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:41:17,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:17,767 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:17,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:41:17,767 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 6 times [2020-10-27 14:41:17,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:17,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187436957] [2020-10-27 14:41:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:17,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:17,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:18,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:18,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:19,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:19,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:19,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:20,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:20,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:20,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:21,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:21,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:22,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:22,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:22,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:22,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:22,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:41:22,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:41:22,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-27 14:41:22,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:22,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:41:22,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:41:22,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:41:22,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:23,592 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-27 14:41:24,108 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-27 14:41:24,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:24,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:24,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:24,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:24,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:24,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:24,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:24,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:24,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:24,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:24,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:24,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:24,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:24,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:24,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:24,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:41:24,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:24,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:24,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:24,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:24,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:41:24,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187436957] [2020-10-27 14:41:24,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:24,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:41:24,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55897198] [2020-10-27 14:41:24,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:41:24,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:24,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:41:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:41:24,917 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 26 states. [2020-10-27 14:41:25,821 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2020-10-27 14:41:26,329 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 14:41:26,645 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 14:41:26,871 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-27 14:41:27,450 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-27 14:41:27,926 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2020-10-27 14:41:28,385 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-27 14:41:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:29,061 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-10-27 14:41:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:41:29,062 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-27 14:41:29,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:29,063 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:41:29,064 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:41:29,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:41:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:41:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2020-10-27 14:41:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:41:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2020-10-27 14:41:29,080 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 45 [2020-10-27 14:41:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:29,080 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2020-10-27 14:41:29,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:41:29,080 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2020-10-27 14:41:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:41:29,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:29,082 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 14:41:29,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:41:29,082 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 4 times [2020-10-27 14:41:29,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:29,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890327070] [2020-10-27 14:41:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:29,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:29,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:29,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:29,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:29,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:29,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:30,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:30,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:31,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:32,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:34,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:34,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:41:34,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:41:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:41:34,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:34,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:41:34,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:41:34,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:41:34,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:34,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:34,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:34,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:34,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:34,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:34,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:34,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:34,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:34,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:34,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:34,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:34,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:34,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:34,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:34,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:34,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:41:34,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:34,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:34,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:34,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:34,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:41:34,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890327070] [2020-10-27 14:41:34,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:34,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:41:34,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773511529] [2020-10-27 14:41:34,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:41:34,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:41:34,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:41:34,476 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 17 states. [2020-10-27 14:41:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:35,344 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-10-27 14:41:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:41:35,344 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-27 14:41:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:35,346 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:41:35,346 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:41:35,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:41:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:41:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-10-27 14:41:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:41:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2020-10-27 14:41:35,365 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 45 [2020-10-27 14:41:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:35,366 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2020-10-27 14:41:35,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:41:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2020-10-27 14:41:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:41:35,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:35,368 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 14:41:35,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:41:35,368 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:35,368 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 5 times [2020-10-27 14:41:35,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:35,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249670107] [2020-10-27 14:41:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:35,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:35,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:35,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:35,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:36,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:36,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:36,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:36,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:38,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:39,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:39,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:40,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:40,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:40,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:40,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:41:40,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:41:40,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:41:40,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:41:40,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:41:40,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:41:40,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:40,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:40,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:40,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:40,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:40,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:40,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:40,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:40,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:40,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:40,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:40,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:40,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:40,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:40,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:40,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:40,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:40,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:40,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:40,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:40,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:40,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:40,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 14:41:40,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249670107] [2020-10-27 14:41:40,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:40,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:41:40,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194284687] [2020-10-27 14:41:40,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:41:40,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:40,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:41:40,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:41:40,705 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 14 states. [2020-10-27 14:41:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:41,509 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-10-27 14:41:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:41:41,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 14:41:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:41,510 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:41:41,510 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:41:41,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:41:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:41:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-10-27 14:41:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:41:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2020-10-27 14:41:41,534 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 45 [2020-10-27 14:41:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:41,535 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2020-10-27 14:41:41,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:41:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2020-10-27 14:41:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:41:41,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:41,537 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 14:41:41,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:41:41,537 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:41,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:41,537 INFO L82 PathProgramCache]: Analyzing trace with hash -437163407, now seen corresponding path program 6 times [2020-10-27 14:41:41,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:41,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756320310] [2020-10-27 14:41:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:41,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:41,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:41,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:42,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:42,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:42,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:46,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:46,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:41:46,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:41:46,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4785 [2020-10-27 14:41:46,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:46,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:41:46,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:41:46,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:41:46,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:46,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:46,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:46,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:46,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:46,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:46,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:46,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:46,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:46,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:46,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:46,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:46,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:46,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:46,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:46,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:46,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:46,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:41:46,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:46,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:46,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:46,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:46,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:41:46,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756320310] [2020-10-27 14:41:46,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:46,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:41:46,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050415897] [2020-10-27 14:41:46,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:41:46,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:46,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:41:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:41:46,783 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand 15 states. [2020-10-27 14:41:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:47,594 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-10-27 14:41:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:41:47,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 14:41:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:47,597 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:41:47,597 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:41:47,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:41:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:41:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-10-27 14:41:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:41:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-10-27 14:41:47,628 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 45 [2020-10-27 14:41:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:47,628 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-10-27 14:41:47,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:41:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-10-27 14:41:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:41:47,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:47,629 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:47,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:41:47,630 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1846739949, now seen corresponding path program 7 times [2020-10-27 14:41:47,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:47,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149669872] [2020-10-27 14:41:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:47,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:48,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:48,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:41:48,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:41:48,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1234 [2020-10-27 14:41:48,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:41:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:41:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:41:48,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:49,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:49,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:49,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:49,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:49,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:49,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:41:49,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:49,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:49,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:49,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:49,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:49,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:49,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:49,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:49,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:49,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:41:49,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149669872] [2020-10-27 14:41:49,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:49,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:41:49,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795515832] [2020-10-27 14:41:49,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:41:49,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:49,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:41:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:41:49,051 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 12 states. [2020-10-27 14:41:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:49,579 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2020-10-27 14:41:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:41:49,579 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 14:41:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:49,581 INFO L225 Difference]: With dead ends: 185 [2020-10-27 14:41:49,581 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 14:41:49,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:41:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 14:41:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 69. [2020-10-27 14:41:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:41:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-10-27 14:41:49,599 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2020-10-27 14:41:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:49,599 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-10-27 14:41:49,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:41:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-10-27 14:41:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:41:49,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:49,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-27 14:41:49,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:41:49,601 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -709469432, now seen corresponding path program 7 times [2020-10-27 14:41:49,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:49,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602369209] [2020-10-27 14:41:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:49,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:49,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:49,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:49,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:49,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:50,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:50,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:50,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:50,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:51,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:51,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:51,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:52,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:52,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:52,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:53,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:53,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:53,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:53,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:53,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:53,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:53,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:53,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:54,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:54,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:54,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:54,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 14:41:54,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 14:41:54,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:41:54,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:54,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:41:54,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:41:54,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:41:54,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:54,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:54,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:54,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:54,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:54,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:54,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:41:54,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:54,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:54,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:54,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:54,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:54,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:54,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:54,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:54,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:54,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:54,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:54,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:54,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:41:54,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602369209] [2020-10-27 14:41:54,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:54,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:41:54,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889396099] [2020-10-27 14:41:54,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:41:54,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:41:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:41:54,747 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-10-27 14:41:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:55,123 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-27 14:41:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:41:55,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 14:41:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:55,125 INFO L225 Difference]: With dead ends: 92 [2020-10-27 14:41:55,125 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:41:55,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:41:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:41:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 57. [2020-10-27 14:41:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:41:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-27 14:41:55,137 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 48 [2020-10-27 14:41:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:55,137 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-27 14:41:55,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:41:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-27 14:41:55,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:41:55,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:55,138 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:55,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:41:55,139 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2062803320, now seen corresponding path program 8 times [2020-10-27 14:41:55,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:55,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890384314] [2020-10-27 14:41:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:55,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:55,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:55,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:55,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:55,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:55,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:55,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:55,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:56,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:56,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:57,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:57,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:57,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:57,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:57,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:58,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:58,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:58,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:58,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:58,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:58,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:59,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:59,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:59,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:00,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:00,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:42:00,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-27 14:42:00,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:42:00,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:42:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:42:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:42:00,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:00,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:00,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:00,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:00,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:00,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:00,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:42:00,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:00,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:00,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:00,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:00,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:00,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:00,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:00,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:00,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:00,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:00,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:42:00,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:00,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:00,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:00,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:00,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:42:00,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890384314] [2020-10-27 14:42:00,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:00,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:42:00,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014590850] [2020-10-27 14:42:00,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:42:00,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:00,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:42:00,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:42:00,940 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 20 states. [2020-10-27 14:42:01,486 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-27 14:42:01,737 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-27 14:42:01,988 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-27 14:42:02,393 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-27 14:42:02,561 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-27 14:42:02,741 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 14:42:02,977 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-27 14:42:03,246 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-27 14:42:03,416 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-27 14:42:03,643 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-27 14:42:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:04,160 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-10-27 14:42:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:42:04,161 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-27 14:42:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:04,162 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:42:04,162 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:42:04,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:42:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:42:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2020-10-27 14:42:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:42:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-27 14:42:04,180 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 50 [2020-10-27 14:42:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:04,180 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-27 14:42:04,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:42:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-27 14:42:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:42:04,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:04,181 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-27 14:42:04,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:42:04,182 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:04,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1414515526, now seen corresponding path program 8 times [2020-10-27 14:42:04,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:04,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856750342] [2020-10-27 14:42:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:04,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:04,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:04,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:04,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:05,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:05,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:05,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:05,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:05,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:06,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:06,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:07,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:07,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:08,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:08,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:08,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:09,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:09,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:42:09,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:42:09,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:42:09,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:42:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:42:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:42:09,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:09,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:09,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:09,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:09,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:09,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:09,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:42:09,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:09,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:09,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:09,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:09,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:09,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:09,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:09,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:09,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:09,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:09,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:09,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:09,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:09,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:09,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:09,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:42:09,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856750342] [2020-10-27 14:42:09,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:09,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:42:09,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390729282] [2020-10-27 14:42:09,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:42:09,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:09,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:42:09,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:42:09,367 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 12 states. [2020-10-27 14:42:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:09,839 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2020-10-27 14:42:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:42:09,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-27 14:42:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:09,841 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:42:09,841 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 14:42:09,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:42:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 14:42:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 59. [2020-10-27 14:42:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:42:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-27 14:42:09,854 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 50 [2020-10-27 14:42:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:09,854 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-27 14:42:09,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:42:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-27 14:42:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:42:09,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:09,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:09,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:42:09,856 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:09,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 9 times [2020-10-27 14:42:09,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:09,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760636256] [2020-10-27 14:42:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:09,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:10,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:11,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:11,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:12,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:12,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:13,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:14,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:14,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:14,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:42:14,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:42:14,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:42:14,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:14,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:42:14,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:42:14,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:42:14,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:16,169 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-27 14:42:16,317 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-27 14:42:16,474 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-27 14:42:16,824 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-27 14:42:17,052 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-27 14:42:18,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:18,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:18,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:18,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:18,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:18,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:42:18,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:18,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:18,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:18,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:18,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:18,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:18,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:18,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:18,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:18,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:42:18,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:18,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:18,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760636256] [2020-10-27 14:42:18,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:18,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:42:18,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333077874] [2020-10-27 14:42:18,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:42:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:42:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:42:18,520 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 34 states. [2020-10-27 14:42:19,540 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-27 14:42:19,919 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 14:42:20,393 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 36 [2020-10-27 14:42:20,731 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 39 [2020-10-27 14:42:21,022 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 27 [2020-10-27 14:42:21,535 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 76 [2020-10-27 14:42:21,880 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2020-10-27 14:42:22,419 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 72 [2020-10-27 14:42:22,725 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2020-10-27 14:42:23,260 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-27 14:42:23,763 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-27 14:42:24,380 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2020-10-27 14:42:24,815 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-10-27 14:42:25,079 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-27 14:42:25,800 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 51 [2020-10-27 14:42:26,411 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-27 14:42:26,662 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 14:42:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:27,312 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2020-10-27 14:42:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:42:27,313 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-10-27 14:42:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:27,315 INFO L225 Difference]: With dead ends: 115 [2020-10-27 14:42:27,315 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 14:42:27,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=401, Invalid=3631, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 14:42:27,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 14:42:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 78. [2020-10-27 14:42:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:42:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-27 14:42:27,331 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 52 [2020-10-27 14:42:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:27,332 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-27 14:42:27,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:42:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-27 14:42:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:42:27,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:27,333 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-27 14:42:27,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:42:27,333 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 9 times [2020-10-27 14:42:27,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:27,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177428028] [2020-10-27 14:42:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:27,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:27,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:27,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:28,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:28,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:29,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:29,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:32,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:32,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:42:32,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:42:32,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:42:32,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:32,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:42:32,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:42:32,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:42:32,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:33,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:33,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:33,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:33,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:33,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:33,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:42:33,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:33,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:33,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:33,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:33,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:33,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:33,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:33,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:33,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:33,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:42:33,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177428028] [2020-10-27 14:42:33,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:33,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:42:33,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748030446] [2020-10-27 14:42:33,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:42:33,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:33,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:42:33,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:42:33,141 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 20 states. [2020-10-27 14:42:34,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:34,479 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2020-10-27 14:42:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:42:34,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:42:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:34,481 INFO L225 Difference]: With dead ends: 116 [2020-10-27 14:42:34,481 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 14:42:34,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:42:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 14:42:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2020-10-27 14:42:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:42:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-27 14:42:34,499 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 52 [2020-10-27 14:42:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:34,499 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-27 14:42:34,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:42:34,499 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-27 14:42:34,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:42:34,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:34,500 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-27 14:42:34,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:42:34,500 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:34,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 10 times [2020-10-27 14:42:34,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:34,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246382577] [2020-10-27 14:42:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:34,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:36,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:36,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:37,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:37,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:37,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:38,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:38,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:39,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:42:39,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:42:39,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:42:39,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:39,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:42:39,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:42:39,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:42:39,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:39,861 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-27 14:42:40,273 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-27 14:42:40,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:40,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:40,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:40,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:40,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:40,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:42:40,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:40,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:40,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:40,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:40,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:40,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:40,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:40,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:40,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:40,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:40,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:42:40,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:40,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:40,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:40,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:40,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-27 14:42:40,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246382577] [2020-10-27 14:42:40,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:40,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:42:40,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877742156] [2020-10-27 14:42:40,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:42:40,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:40,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:42:40,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:42:40,635 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 17 states. [2020-10-27 14:42:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:42,022 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-10-27 14:42:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:42:42,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-27 14:42:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:42,027 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:42:42,027 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:42:42,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:42:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:42:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-10-27 14:42:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:42:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-10-27 14:42:42,052 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 52 [2020-10-27 14:42:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:42,052 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-10-27 14:42:42,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:42:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-10-27 14:42:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:42:42,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:42,053 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-27 14:42:42,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:42:42,053 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:42,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:42,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1689012476, now seen corresponding path program 11 times [2020-10-27 14:42:42,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:42,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070652977] [2020-10-27 14:42:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:42,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:42,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:42,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:42,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:43,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:43,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:43,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:44,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:46,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:47,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:47,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:42:47,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:42:47,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:42:47,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:47,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:42:47,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:42:47,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:42:47,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:47,395 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-27 14:42:47,583 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-27 14:42:47,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:47,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:47,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:47,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:47,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:42:47,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:47,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:47,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:47,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:47,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:47,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:47,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:47,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:47,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:47,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:47,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:47,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:47,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:42:47,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070652977] [2020-10-27 14:42:47,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:47,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:42:47,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792939683] [2020-10-27 14:42:47,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:42:47,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:47,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:42:47,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:42:47,867 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 20 states. [2020-10-27 14:42:48,458 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-27 14:42:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:49,258 INFO L93 Difference]: Finished difference Result 133 states and 157 transitions. [2020-10-27 14:42:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:42:49,258 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:42:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:49,260 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:42:49,260 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:42:49,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:42:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:42:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2020-10-27 14:42:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 14:42:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2020-10-27 14:42:49,290 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 52 [2020-10-27 14:42:49,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:49,290 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2020-10-27 14:42:49,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:42:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2020-10-27 14:42:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:42:49,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:49,292 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:49,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:42:49,292 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:49,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 10 times [2020-10-27 14:42:49,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:49,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565436729] [2020-10-27 14:42:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:49,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:51,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:51,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:42:51,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:42:51,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2595 [2020-10-27 14:42:51,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:51,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:42:51,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:42:51,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:42:51,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:52,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:52,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:52,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:52,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:52,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:52,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:42:52,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:52,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:52,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:52,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:52,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:52,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:52,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:52,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:52,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:42:52,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:52,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:42:52,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565436729] [2020-10-27 14:42:52,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:52,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:42:52,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854509671] [2020-10-27 14:42:52,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:42:52,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:52,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:42:52,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:42:52,080 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand 14 states. [2020-10-27 14:42:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:52,674 INFO L93 Difference]: Finished difference Result 300 states and 363 transitions. [2020-10-27 14:42:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:42:52,675 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-27 14:42:52,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:52,676 INFO L225 Difference]: With dead ends: 300 [2020-10-27 14:42:52,677 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 14:42:52,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:42:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 14:42:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 111. [2020-10-27 14:42:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 14:42:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2020-10-27 14:42:52,702 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 54 [2020-10-27 14:42:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:52,702 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2020-10-27 14:42:52,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:42:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2020-10-27 14:42:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:42:52,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:52,703 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:52,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:42:52,704 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:52,704 INFO L82 PathProgramCache]: Analyzing trace with hash -740835996, now seen corresponding path program 11 times [2020-10-27 14:42:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:52,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829767113] [2020-10-27 14:42:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:52,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:52,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:53,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:53,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:54,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:54,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:56,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:56,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:57,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:57,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:57,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:57,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:42:57,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:42:57,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:42:57,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:42:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:42:57,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:42:57,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:58,166 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-27 14:42:58,303 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-27 14:42:58,465 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 14:42:58,644 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-27 14:42:58,795 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 14:42:58,987 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-27 14:42:59,220 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-27 14:42:59,468 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-27 14:42:59,713 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-27 14:42:59,893 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-27 14:43:00,094 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-10-27 14:43:00,265 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-10-27 14:43:00,472 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 42 [2020-10-27 14:43:00,646 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2020-10-27 14:43:00,823 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2020-10-27 14:43:00,987 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2020-10-27 14:43:01,165 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-27 14:43:01,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:01,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:01,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:01,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:01,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:01,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:01,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:01,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:01,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:01,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:01,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:01,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:01,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:43:01,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829767113] [2020-10-27 14:43:01,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:01,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:43:01,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163644665] [2020-10-27 14:43:01,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:43:01,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:01,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:43:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:43:01,779 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand 31 states. [2020-10-27 14:43:02,305 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-10-27 14:43:02,638 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2020-10-27 14:43:02,943 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-27 14:43:03,346 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2020-10-27 14:43:03,653 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-27 14:43:03,811 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-27 14:43:04,254 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-27 14:43:04,500 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-27 14:43:04,860 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-27 14:43:05,204 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-27 14:43:05,780 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-27 14:43:06,079 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-27 14:43:06,446 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-27 14:43:06,897 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2020-10-27 14:43:07,477 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-27 14:43:07,668 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-27 14:43:08,153 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 14:43:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:08,760 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2020-10-27 14:43:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:43:08,761 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 54 [2020-10-27 14:43:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:08,762 INFO L225 Difference]: With dead ends: 138 [2020-10-27 14:43:08,763 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 14:43:08,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 14:43:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 14:43:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 93. [2020-10-27 14:43:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:43:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-10-27 14:43:08,788 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 54 [2020-10-27 14:43:08,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:08,789 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-10-27 14:43:08,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:43:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-10-27 14:43:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:43:08,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:08,790 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1] [2020-10-27 14:43:08,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:43:08,790 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1988648239, now seen corresponding path program 12 times [2020-10-27 14:43:08,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:08,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990543266] [2020-10-27 14:43:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:08,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:09,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:09,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:09,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:09,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:10,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:10,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:10,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:11,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:11,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:11,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:13,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:13,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:13,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:13,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:43:13,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 14:43:13,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:43:13,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:13,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:43:13,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:43:13,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:43:13,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:13,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:13,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:13,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:13,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:13,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:13,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:43:13,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:13,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:13,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:13,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:13,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:13,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:13,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:13,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:13,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:13,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:13,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:13,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:13,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:43:13,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990543266] [2020-10-27 14:43:13,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:13,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:43:13,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468491549] [2020-10-27 14:43:13,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:43:13,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:13,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:43:13,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:43:13,983 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 14 states. [2020-10-27 14:43:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:14,648 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2020-10-27 14:43:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:43:14,649 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-27 14:43:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:14,650 INFO L225 Difference]: With dead ends: 140 [2020-10-27 14:43:14,650 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 14:43:14,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:43:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 14:43:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-10-27 14:43:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:43:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-27 14:43:14,673 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 57 [2020-10-27 14:43:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:14,673 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-27 14:43:14,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:43:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-27 14:43:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:43:14,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:14,674 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:14,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:43:14,674 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:14,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 13 times [2020-10-27 14:43:14,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:14,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51959748] [2020-10-27 14:43:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:14,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:15,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:15,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:16,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:16,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:17,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:19,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:43:19,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:43:19,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:43:19,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:43:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:43:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:43:19,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:20,355 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-27 14:43:20,543 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-27 14:43:20,759 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-27 14:43:20,912 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-27 14:43:21,066 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-27 14:43:21,217 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-27 14:43:21,371 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-27 14:43:21,857 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-27 14:43:23,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:23,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:23,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:23,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:23,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:23,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:23,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:23,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:23,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:23,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:23,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:23,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:23,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:23,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:23,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:23,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:43:23,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51959748] [2020-10-27 14:43:23,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:23,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:43:23,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654878727] [2020-10-27 14:43:23,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:43:23,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:23,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:43:23,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:43:23,588 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 37 states. [2020-10-27 14:43:25,382 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 14:43:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:26,911 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-10-27 14:43:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:43:26,912 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 59 [2020-10-27 14:43:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:26,913 INFO L225 Difference]: With dead ends: 109 [2020-10-27 14:43:26,913 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:43:26,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=111, Invalid=1781, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:43:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:43:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2020-10-27 14:43:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:43:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-10-27 14:43:26,938 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 59 [2020-10-27 14:43:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:26,938 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-10-27 14:43:26,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:43:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-10-27 14:43:26,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:43:26,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:26,939 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:26,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:43:26,939 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:26,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:26,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 12 times [2020-10-27 14:43:26,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:26,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232541165] [2020-10-27 14:43:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:26,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:27,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:27,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:27,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:27,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:27,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:29,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:29,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:31,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:31,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:31,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:43:31,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:43:31,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:43:31,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:31,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:43:31,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:43:31,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:43:31,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:32,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:32,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:32,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:32,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:32,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:32,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:32,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:32,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:32,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:32,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:32,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:32,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:32,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:32,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:32,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:32,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:32,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:32,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:32,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:32,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:32,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:32,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-27 14:43:32,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232541165] [2020-10-27 14:43:32,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:32,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:43:32,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559497603] [2020-10-27 14:43:32,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:43:32,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:32,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:43:32,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:43:32,984 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 21 states. [2020-10-27 14:43:33,600 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-27 14:43:34,051 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 14:43:34,192 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-27 14:43:34,953 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-27 14:43:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:35,581 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-10-27 14:43:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:43:35,583 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 14:43:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:35,584 INFO L225 Difference]: With dead ends: 135 [2020-10-27 14:43:35,584 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:43:35,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:43:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:43:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2020-10-27 14:43:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 14:43:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2020-10-27 14:43:35,611 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 59 [2020-10-27 14:43:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:35,611 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2020-10-27 14:43:35,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:43:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2020-10-27 14:43:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:43:35,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:35,612 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:35,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:43:35,612 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 13 times [2020-10-27 14:43:35,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:35,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121847958] [2020-10-27 14:43:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:35,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:39,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:40,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:40,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:43:40,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:43:40,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:43:40,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:43:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:43:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:43:40,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:41,046 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-27 14:43:41,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:41,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:41,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:41,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:41,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:41,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:41,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:41,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:41,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:41,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:41,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:41,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:41,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:41,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:41,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:41,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:41,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:41,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:41,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:41,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:41,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:43:41,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121847958] [2020-10-27 14:43:41,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:41,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:43:41,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655500055] [2020-10-27 14:43:41,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:43:41,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:41,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:43:41,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:43:41,968 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 25 states. [2020-10-27 14:43:43,201 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 14:43:44,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:44,112 INFO L93 Difference]: Finished difference Result 164 states and 196 transitions. [2020-10-27 14:43:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:43:44,113 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-27 14:43:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:44,114 INFO L225 Difference]: With dead ends: 164 [2020-10-27 14:43:44,115 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 14:43:44,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=412, Invalid=1844, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:43:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 14:43:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 109. [2020-10-27 14:43:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 14:43:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2020-10-27 14:43:44,151 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 59 [2020-10-27 14:43:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:44,151 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-10-27 14:43:44,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:43:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2020-10-27 14:43:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:43:44,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:44,152 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:44,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:43:44,152 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 14 times [2020-10-27 14:43:44,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:44,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863528751] [2020-10-27 14:43:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:44,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:45,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:45,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:45,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:45,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:46,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:48,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:48,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:49,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:49,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:43:49,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:43:49,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:43:49,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:43:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:43:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:43:49,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:49,860 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2020-10-27 14:43:50,227 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2020-10-27 14:43:50,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:50,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:50,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:50,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:50,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:50,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:50,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:50,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:50,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:50,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:50,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:50,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:50,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:50,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:50,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:50,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:43:50,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863528751] [2020-10-27 14:43:50,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:50,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:43:50,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211374890] [2020-10-27 14:43:50,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:43:50,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:43:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:43:50,741 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 22 states. [2020-10-27 14:43:51,234 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2020-10-27 14:43:51,639 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2020-10-27 14:43:52,034 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-27 14:43:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:52,849 INFO L93 Difference]: Finished difference Result 146 states and 173 transitions. [2020-10-27 14:43:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:43:52,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-27 14:43:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:52,851 INFO L225 Difference]: With dead ends: 146 [2020-10-27 14:43:52,852 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 14:43:52,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:43:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 14:43:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2020-10-27 14:43:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 14:43:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2020-10-27 14:43:52,901 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 59 [2020-10-27 14:43:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:52,901 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2020-10-27 14:43:52,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:43:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2020-10-27 14:43:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:43:52,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:52,904 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:52,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:43:52,904 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:52,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1291630161, now seen corresponding path program 15 times [2020-10-27 14:43:52,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:52,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11315732] [2020-10-27 14:43:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:52,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:53,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:53,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:53,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:55,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:55,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:57,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:43:57,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:43:57,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:43:57,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:43:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:43:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:43:57,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:58,541 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-27 14:43:58,837 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2020-10-27 14:43:59,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:59,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:59,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:59,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:59,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:59,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:59,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:59,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:59,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:59,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:59,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:59,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:59,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:59,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:59,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:59,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:43:59,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11315732] [2020-10-27 14:43:59,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:59,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:43:59,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520894711] [2020-10-27 14:43:59,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:43:59,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:59,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:43:59,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:43:59,163 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand 21 states. [2020-10-27 14:43:59,667 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-10-27 14:43:59,926 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-27 14:44:00,251 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-27 14:44:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:00,658 INFO L93 Difference]: Finished difference Result 169 states and 203 transitions. [2020-10-27 14:44:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:44:00,659 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 14:44:00,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:00,660 INFO L225 Difference]: With dead ends: 169 [2020-10-27 14:44:00,660 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 14:44:00,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:44:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 14:44:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-27 14:44:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 14:44:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2020-10-27 14:44:00,699 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 59 [2020-10-27 14:44:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:00,699 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2020-10-27 14:44:00,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:44:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2020-10-27 14:44:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:44:00,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:00,700 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:00,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:44:00,700 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 14 times [2020-10-27 14:44:00,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:00,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344880511] [2020-10-27 14:44:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:00,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:00,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:04,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:04,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:44:04,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:44:04,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4078 [2020-10-27 14:44:04,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:04,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:44:04,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:44:04,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:44:04,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:05,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:05,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:05,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:05,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:05,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:05,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:05,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:05,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:05,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:05,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:05,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:05,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:05,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:05,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:05,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:05,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:05,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:05,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:05,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:44:05,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344880511] [2020-10-27 14:44:05,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:05,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:44:05,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469708051] [2020-10-27 14:44:05,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:44:05,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:05,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:44:05,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:44:05,024 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand 16 states. [2020-10-27 14:44:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:05,793 INFO L93 Difference]: Finished difference Result 408 states and 503 transitions. [2020-10-27 14:44:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:44:05,795 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-27 14:44:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:05,797 INFO L225 Difference]: With dead ends: 408 [2020-10-27 14:44:05,797 INFO L226 Difference]: Without dead ends: 233 [2020-10-27 14:44:05,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:44:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-27 14:44:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 121. [2020-10-27 14:44:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 14:44:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 147 transitions. [2020-10-27 14:44:05,841 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 147 transitions. Word has length 61 [2020-10-27 14:44:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:05,841 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 147 transitions. [2020-10-27 14:44:05,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:44:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 147 transitions. [2020-10-27 14:44:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:44:05,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:05,842 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:05,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:44:05,842 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:05,843 INFO L82 PathProgramCache]: Analyzing trace with hash 519142560, now seen corresponding path program 15 times [2020-10-27 14:44:05,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:05,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15705227] [2020-10-27 14:44:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:05,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:05,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:07,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:08,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:09,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:09,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:09,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:09,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:09,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:09,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:09,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:09,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:10,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:10,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:10,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:10,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:10,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:10,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:10,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:44:10,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 14:44:10,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:44:10,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:10,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:44:10,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:44:10,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:44:10,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:11,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:11,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:11,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:11,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:11,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:11,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:11,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:11,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:11,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:11,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:11,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:11,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:11,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:11,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:11,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:11,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:11,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:11,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:11,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:11,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:44:11,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15705227] [2020-10-27 14:44:11,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:11,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:44:11,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215181620] [2020-10-27 14:44:11,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:44:11,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:11,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:44:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:44:11,253 INFO L87 Difference]: Start difference. First operand 121 states and 147 transitions. Second operand 20 states. [2020-10-27 14:44:12,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:12,534 INFO L93 Difference]: Finished difference Result 225 states and 268 transitions. [2020-10-27 14:44:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:44:12,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-27 14:44:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:12,536 INFO L225 Difference]: With dead ends: 225 [2020-10-27 14:44:12,537 INFO L226 Difference]: Without dead ends: 218 [2020-10-27 14:44:12,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:44:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-27 14:44:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 124. [2020-10-27 14:44:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 14:44:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2020-10-27 14:44:12,591 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 64 [2020-10-27 14:44:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:12,592 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2020-10-27 14:44:12,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:44:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2020-10-27 14:44:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:44:12,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:12,593 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1] [2020-10-27 14:44:12,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:44:12,593 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:12,594 INFO L82 PathProgramCache]: Analyzing trace with hash 385129054, now seen corresponding path program 16 times [2020-10-27 14:44:12,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:12,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102228243] [2020-10-27 14:44:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:12,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:12,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:12,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:12,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:12,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking...