/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-examples/standard_init6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:26:28,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:26:28,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:26:28,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:26:28,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:26:28,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:26:28,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:26:28,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:26:28,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:26:28,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:26:28,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:26:28,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:26:28,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:26:28,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:26:28,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:26:28,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:26:28,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:26:28,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:26:28,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:26:28,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:26:28,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:26:28,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:26:28,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:26:28,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:26:28,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:26:28,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:26:28,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:26:28,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:26:28,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:26:28,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:26:28,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:26:28,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:26:28,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:26:28,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:26:28,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:26:28,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:26:28,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:26:28,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:26:28,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:26:28,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:26:28,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:26:28,761 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 14:26:28,817 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:26:28,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:26:28,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:26:28,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:26:28,824 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:26:28,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:26:28,825 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:26:28,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:26:28,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:26:28,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:26:28,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:26:28,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:26:28,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:26:28,827 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:26:28,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:26:28,827 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:26:28,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:26:28,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:26:28,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:26:28,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:26:28,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:26:28,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:26:28,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:26:28,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:26:28,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:26:28,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:26:28,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:26:28,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:26:28,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:26:28,831 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:26:29,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:26:29,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:26:29,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:26:29,260 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:26:29,261 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:26:29,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2020-10-27 14:26:29,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba3eb44f9/a58deaa88a124773b4dbc3c19b01d2e0/FLAG69614d4b2 [2020-10-27 14:26:29,959 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:26:29,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2020-10-27 14:26:29,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba3eb44f9/a58deaa88a124773b4dbc3c19b01d2e0/FLAG69614d4b2 [2020-10-27 14:26:30,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba3eb44f9/a58deaa88a124773b4dbc3c19b01d2e0 [2020-10-27 14:26:30,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:26:30,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:26:30,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:30,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:26:30,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:26:30,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:30" (1/1) ... [2020-10-27 14:26:30,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26fda3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30, skipping insertion in model container [2020-10-27 14:26:30,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:30" (1/1) ... [2020-10-27 14:26:30,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:26:30,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:26:30,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:30,635 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:26:30,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:30,679 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:26:30,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30 WrapperNode [2020-10-27 14:26:30,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:30,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:26:30,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:26:30,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:26:30,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30" (1/1) ... [2020-10-27 14:26:30,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30" (1/1) ... [2020-10-27 14:26:30,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30" (1/1) ... [2020-10-27 14:26:30,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30" (1/1) ... [2020-10-27 14:26:30,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30" (1/1) ... [2020-10-27 14:26:30,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30" (1/1) ... [2020-10-27 14:26:30,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30" (1/1) ... [2020-10-27 14:26:30,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:26:30,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:26:30,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:26:30,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:26:30,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30" (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 14:26:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:26:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:26:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:26:30,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:26:30,844 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:26:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:26:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:26:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:26:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:26:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:26:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:26:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:26:30,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:26:30,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:26:30,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:26:30,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:26:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:26:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:26:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:26:31,268 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:26:31,269 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-27 14:26:31,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:31 BoogieIcfgContainer [2020-10-27 14:26:31,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:26:31,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:26:31,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:26:31,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:26:31,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:26:30" (1/3) ... [2020-10-27 14:26:31,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483cc8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:31, skipping insertion in model container [2020-10-27 14:26:31,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:30" (2/3) ... [2020-10-27 14:26:31,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483cc8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:31, skipping insertion in model container [2020-10-27 14:26:31,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:31" (3/3) ... [2020-10-27 14:26:31,281 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2020-10-27 14:26:31,296 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:26:31,301 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:26:31,349 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:26:31,400 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:26:31,400 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:26:31,400 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:26:31,401 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:26:31,401 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:26:31,401 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:26:31,401 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:26:31,401 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:26:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-27 14:26:31,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:26:31,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:31,439 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] [2020-10-27 14:26:31,439 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:31,450 INFO L82 PathProgramCache]: Analyzing trace with hash 214825398, now seen corresponding path program 1 times [2020-10-27 14:26:31,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:31,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435448532] [2020-10-27 14:26:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:31,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:31,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:33,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:33,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:26:33,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:26:33,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1808 [2020-10-27 14:26:33,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:33,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:26:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:26:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:26:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:26:33,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:33,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:33,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:33,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:33,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:26:33,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:33,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:33,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:33,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:33,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:33,599 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 14:26:33,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435448532] [2020-10-27 14:26:33,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:26:33,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:26:33,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244281020] [2020-10-27 14:26:33,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:26:33,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:26:33,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:33,627 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-10-27 14:26:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:33,804 INFO L93 Difference]: Finished difference Result 72 states and 114 transitions. [2020-10-27 14:26:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:26:33,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 14:26:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:33,816 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:26:33,816 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:26:33,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:26:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 14:26:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:26:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-27 14:26:33,869 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-27 14:26:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:33,869 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-27 14:26:33,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:26:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-27 14:26:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:26:33,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:33,871 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 14:26:33,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:26:33,872 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:33,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1214100017, now seen corresponding path program 1 times [2020-10-27 14:26:33,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:33,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722030264] [2020-10-27 14:26:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:33,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:33,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:33,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:34,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:37,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:38,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:38,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:26:38,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:26:38,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:26:38,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:26:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:26:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:26:38,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:38,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:38,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:38,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:38,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:38,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:26:38,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:38,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:38,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:38,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:38,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 14:26:38,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722030264] [2020-10-27 14:26:38,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:38,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:26:38,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011744148] [2020-10-27 14:26:38,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:26:38,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:26:38,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:26:38,971 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 5 states. [2020-10-27 14:26:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:39,138 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2020-10-27 14:26:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:26:39,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-27 14:26:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:39,140 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:26:39,140 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:26:39,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:26:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:26:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 14:26:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:26:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-27 14:26:39,153 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 31 [2020-10-27 14:26:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:39,153 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-27 14:26:39,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:26:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-27 14:26:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:26:39,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:39,155 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] [2020-10-27 14:26:39,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:26:39,155 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1678914002, now seen corresponding path program 2 times [2020-10-27 14:26:39,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:39,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376851667] [2020-10-27 14:26:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:39,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:39,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:44,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:26:44,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:26:44,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:26:44,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:26:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:26:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:26:44,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:44,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:44,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:44,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:26:44,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:44,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:44,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:44,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:44,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:26:44,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376851667] [2020-10-27 14:26:44,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:44,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:26:44,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447163682] [2020-10-27 14:26:44,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:26:44,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:44,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:26:44,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:26:44,309 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 6 states. [2020-10-27 14:26:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:44,528 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-10-27 14:26:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:26:44,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-27 14:26:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:44,531 INFO L225 Difference]: With dead ends: 81 [2020-10-27 14:26:44,531 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:26:44,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:26:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:26:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 14:26:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:26:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-27 14:26:44,542 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2020-10-27 14:26:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:44,542 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-27 14:26:44,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:26:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-27 14:26:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:26:44,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:44,544 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:44,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:26:44,545 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:44,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:44,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1997413423, now seen corresponding path program 3 times [2020-10-27 14:26:44,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:44,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113809102] [2020-10-27 14:26:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:44,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:46,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:49,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:49,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:26:49,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:26:49,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:26:49,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:49,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:26:49,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:26:49,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:26:49,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:49,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:49,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:49,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:49,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:49,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:26:49,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:49,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:26:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-27 14:26:49,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113809102] [2020-10-27 14:26:49,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:49,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:26:49,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603845948] [2020-10-27 14:26:49,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:26:49,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:49,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:26:49,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:26:49,690 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 7 states. [2020-10-27 14:26:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:49,939 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-27 14:26:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:26:49,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-27 14:26:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:49,941 INFO L225 Difference]: With dead ends: 92 [2020-10-27 14:26:49,941 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 14:26:49,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:26:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 14:26:49,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 14:26:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:26:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-27 14:26:49,960 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2020-10-27 14:26:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:49,962 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-27 14:26:49,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:26:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-27 14:26:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:26:49,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:49,965 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:49,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:26:49,965 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1075963406, now seen corresponding path program 4 times [2020-10-27 14:26:49,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:49,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280858497] [2020-10-27 14:26:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:50,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:52,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:26:55,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:26:55,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:26:55,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:26:55,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:26:55,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:26:55,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:55,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:55,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:55,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:55,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:26:55,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:55,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:55,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:55,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-27 14:26:55,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280858497] [2020-10-27 14:26:55,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:55,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:26:55,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158700482] [2020-10-27 14:26:55,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:26:55,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:55,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:26:55,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:26:55,103 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 8 states. [2020-10-27 14:26:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:55,294 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-10-27 14:26:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:26:55,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-27 14:26:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:55,296 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:26:55,296 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:26:55,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:26:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:26:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 14:26:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:26:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-27 14:26:55,306 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 49 [2020-10-27 14:26:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:55,307 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-27 14:26:55,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:26:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-27 14:26:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:26:55,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:55,308 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:55,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:26:55,309 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1984295567, now seen corresponding path program 5 times [2020-10-27 14:26:55,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:55,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103367901] [2020-10-27 14:26:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:55,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:59,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:00,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:27:00,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:00,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:27:00,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:00,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:27:00,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 14:27:00,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:27:00,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:00,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:00,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:00,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:00,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:00,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:00,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:00,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:00,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:00,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:00,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 14:27:00,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103367901] [2020-10-27 14:27:00,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:00,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:27:00,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555042636] [2020-10-27 14:27:00,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:27:00,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:27:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:00,455 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 9 states. [2020-10-27 14:27:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:00,627 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-10-27 14:27:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:27:00,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-27 14:27:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:00,629 INFO L225 Difference]: With dead ends: 114 [2020-10-27 14:27:00,629 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:27:00,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:27:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-27 14:27:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:27:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-10-27 14:27:00,639 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 55 [2020-10-27 14:27:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:00,639 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-10-27 14:27:00,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:27:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-10-27 14:27:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:27:00,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:00,640 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:00,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:27:00,641 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1472739858, now seen corresponding path program 6 times [2020-10-27 14:27:00,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:00,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485969646] [2020-10-27 14:27:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:00,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:05,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:05,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:27:05,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:05,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:27:05,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:27:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:27:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:27:05,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:05,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:05,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:05,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:05,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:05,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:05,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:05,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:05,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:05,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-27 14:27:05,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485969646] [2020-10-27 14:27:05,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:05,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:27:05,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468116710] [2020-10-27 14:27:05,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:27:05,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:05,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:27:05,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:05,849 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 10 states. [2020-10-27 14:27:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:06,098 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-10-27 14:27:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:27:06,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-27 14:27:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:06,101 INFO L225 Difference]: With dead ends: 125 [2020-10-27 14:27:06,102 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:27:06,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:27:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 14:27:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:27:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-27 14:27:06,121 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 61 [2020-10-27 14:27:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:06,121 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-27 14:27:06,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:27:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-27 14:27:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:27:06,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:06,125 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:06,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:27:06,126 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:06,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1747701999, now seen corresponding path program 7 times [2020-10-27 14:27:06,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:06,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887507020] [2020-10-27 14:27:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:06,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:11,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:27:11,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:11,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:27:11,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:11,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:27:11,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:27:11,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:27:11,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:11,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:11,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:11,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:11,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:11,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:11,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:11,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:11,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:11,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:11,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-27 14:27:11,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887507020] [2020-10-27 14:27:11,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:11,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:27:11,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532012828] [2020-10-27 14:27:11,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:27:11,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:11,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:27:11,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:11,295 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 11 states. [2020-10-27 14:27:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:11,649 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2020-10-27 14:27:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:27:11,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-27 14:27:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:11,650 INFO L225 Difference]: With dead ends: 136 [2020-10-27 14:27:11,650 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 14:27:11,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 14:27:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-27 14:27:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:27:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-27 14:27:11,672 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 67 [2020-10-27 14:27:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:11,672 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-27 14:27:11,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:27:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-27 14:27:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:27:11,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:11,673 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:11,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:27:11,674 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:11,674 INFO L82 PathProgramCache]: Analyzing trace with hash -141651406, now seen corresponding path program 8 times [2020-10-27 14:27:11,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:11,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022379827] [2020-10-27 14:27:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:11,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:16,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:16,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:27:16,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:16,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:27:16,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:16,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:27:16,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:27:16,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:27:16,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:16,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:16,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:16,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:16,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:16,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:16,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:16,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:16,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:16,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:16,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:16,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-27 14:27:16,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022379827] [2020-10-27 14:27:16,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:16,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:27:16,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457857752] [2020-10-27 14:27:16,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:27:16,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:16,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:27:16,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:16,898 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 12 states. [2020-10-27 14:27:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:17,144 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2020-10-27 14:27:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:27:17,144 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-10-27 14:27:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:17,146 INFO L225 Difference]: With dead ends: 147 [2020-10-27 14:27:17,146 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:27:17,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:27:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-27 14:27:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:27:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-27 14:27:17,166 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 73 [2020-10-27 14:27:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:17,167 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-27 14:27:17,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:27:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-27 14:27:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:27:17,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:17,172 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:17,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:27:17,172 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash -836651185, now seen corresponding path program 9 times [2020-10-27 14:27:17,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:17,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839516711] [2020-10-27 14:27:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:22,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:27:22,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:22,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:27:22,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:27:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:27:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:27:22,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:22,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:22,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:22,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:22,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:22,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:22,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:22,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-27 14:27:22,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839516711] [2020-10-27 14:27:22,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:22,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:27:22,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541813491] [2020-10-27 14:27:22,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:27:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:22,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:27:22,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:22,379 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 13 states. [2020-10-27 14:27:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:22,740 INFO L93 Difference]: Finished difference Result 158 states and 175 transitions. [2020-10-27 14:27:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:27:22,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-10-27 14:27:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:22,742 INFO L225 Difference]: With dead ends: 158 [2020-10-27 14:27:22,742 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:27:22,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:27:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-27 14:27:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 14:27:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-27 14:27:22,760 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2020-10-27 14:27:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:22,761 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-27 14:27:22,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:27:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-27 14:27:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:27:22,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:22,772 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:22,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:27:22,772 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1670438318, now seen corresponding path program 10 times [2020-10-27 14:27:22,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:22,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654739700] [2020-10-27 14:27:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:22,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:23,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:23,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:27,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:27,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:27:27,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:27,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:27:27,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:27,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:27:27,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:27:27,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:27:27,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:27,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:27,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:27,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:27,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:27,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:27,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:27,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:27,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:27,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:27,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:27,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-27 14:27:28,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654739700] [2020-10-27 14:27:28,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:28,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:27:28,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067569136] [2020-10-27 14:27:28,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:27:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:27:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:28,008 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 14 states. [2020-10-27 14:27:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:28,251 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2020-10-27 14:27:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:27:28,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-10-27 14:27:28,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:28,253 INFO L225 Difference]: With dead ends: 169 [2020-10-27 14:27:28,253 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:27:28,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:27:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-27 14:27:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:27:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-10-27 14:27:28,261 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 85 [2020-10-27 14:27:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:28,261 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-10-27 14:27:28,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:27:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-10-27 14:27:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:27:28,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:28,263 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:28,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:27:28,263 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:28,264 INFO L82 PathProgramCache]: Analyzing trace with hash 403285423, now seen corresponding path program 11 times [2020-10-27 14:27:28,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:28,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102471393] [2020-10-27 14:27:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:28,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:30,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:33,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:27:33,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:27:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:27:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:27:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:27:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:33,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:33,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:33,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:33,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:33,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:33,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:33,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:33,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:33,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:33,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-27 14:27:33,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102471393] [2020-10-27 14:27:33,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:33,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:27:33,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654966726] [2020-10-27 14:27:33,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:27:33,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:33,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:27:33,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:33,503 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 15 states. [2020-10-27 14:27:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:33,785 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2020-10-27 14:27:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:27:33,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 91 [2020-10-27 14:27:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:33,787 INFO L225 Difference]: With dead ends: 180 [2020-10-27 14:27:33,787 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:27:33,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:27:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-27 14:27:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 14:27:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2020-10-27 14:27:33,801 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 91 [2020-10-27 14:27:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:33,802 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2020-10-27 14:27:33,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:27:33,802 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2020-10-27 14:27:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:27:33,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:33,803 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:33,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:27:33,803 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1428679282, now seen corresponding path program 12 times [2020-10-27 14:27:33,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:33,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580931203] [2020-10-27 14:27:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:33,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:36,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:38,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:38,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:27:38,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:38,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:27:38,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:27:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:27:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:27:38,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:39,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:39,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:39,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:39,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:39,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:39,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:39,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:39,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:39,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:39,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-27 14:27:39,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580931203] [2020-10-27 14:27:39,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:39,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:27:39,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231316792] [2020-10-27 14:27:39,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:27:39,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:27:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:39,068 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand 16 states. [2020-10-27 14:27:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:39,368 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2020-10-27 14:27:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:27:39,369 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-27 14:27:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:39,372 INFO L225 Difference]: With dead ends: 191 [2020-10-27 14:27:39,373 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 14:27:39,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 14:27:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-27 14:27:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 14:27:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2020-10-27 14:27:39,386 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 97 [2020-10-27 14:27:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:39,386 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2020-10-27 14:27:39,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:27:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2020-10-27 14:27:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 14:27:39,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:39,388 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:39,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:27:39,388 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:39,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1002071025, now seen corresponding path program 13 times [2020-10-27 14:27:39,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:39,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892854365] [2020-10-27 14:27:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:39,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:43,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:44,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:27:44,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:44,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:27:44,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:44,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:27:44,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:27:44,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:27:44,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:44,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:44,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:44,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:44,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:44,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:44,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:27:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-10-27 14:27:44,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892854365] [2020-10-27 14:27:44,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:44,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:27:44,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14214879] [2020-10-27 14:27:44,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:27:44,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:44,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:27:44,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:27:44,710 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand 17 states. [2020-10-27 14:27:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:45,029 INFO L93 Difference]: Finished difference Result 202 states and 219 transitions. [2020-10-27 14:27:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:27:45,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 103 [2020-10-27 14:27:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:45,032 INFO L225 Difference]: With dead ends: 202 [2020-10-27 14:27:45,032 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 14:27:45,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:27:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 14:27:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-27 14:27:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 14:27:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2020-10-27 14:27:45,040 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 103 [2020-10-27 14:27:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:45,040 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2020-10-27 14:27:45,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:27:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2020-10-27 14:27:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 14:27:45,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:45,041 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:45,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:27:45,042 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:45,042 INFO L82 PathProgramCache]: Analyzing trace with hash 569830034, now seen corresponding path program 14 times [2020-10-27 14:27:45,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:45,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351534502] [2020-10-27 14:27:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:45,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:27:50,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:27:50,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:27:50,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:27:50,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 14:27:50,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:27:50,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:50,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:50,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:50,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:50,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:50,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:50,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-27 14:27:50,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351534502] [2020-10-27 14:27:50,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:50,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:27:50,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537345453] [2020-10-27 14:27:50,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:27:50,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:50,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:27:50,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:27:50,380 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand 18 states. [2020-10-27 14:27:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:50,747 INFO L93 Difference]: Finished difference Result 213 states and 230 transitions. [2020-10-27 14:27:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:27:50,748 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-10-27 14:27:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:50,750 INFO L225 Difference]: With dead ends: 213 [2020-10-27 14:27:50,750 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:27:50,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:27:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:27:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-27 14:27:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 14:27:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2020-10-27 14:27:50,759 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 109 [2020-10-27 14:27:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:50,759 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2020-10-27 14:27:50,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:27:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2020-10-27 14:27:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 14:27:50,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:50,761 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:50,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:27:50,762 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2142739055, now seen corresponding path program 15 times [2020-10-27 14:27:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:50,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54431541] [2020-10-27 14:27:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:55,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:55,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 14:27:55,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:55,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:27:55,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:55,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:27:55,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-27 14:27:55,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:27:55,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:56,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:56,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:56,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:56,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:56,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-27 14:27:56,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54431541] [2020-10-27 14:27:56,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:56,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:27:56,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279758987] [2020-10-27 14:27:56,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:27:56,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:27:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:27:56,116 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand 19 states. [2020-10-27 14:27:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:56,488 INFO L93 Difference]: Finished difference Result 224 states and 241 transitions. [2020-10-27 14:27:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:27:56,488 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 115 [2020-10-27 14:27:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:56,490 INFO L225 Difference]: With dead ends: 224 [2020-10-27 14:27:56,490 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:27:56,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:27:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:27:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-27 14:27:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 14:27:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-10-27 14:27:56,504 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 115 [2020-10-27 14:27:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:56,504 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-10-27 14:27:56,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:27:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-10-27 14:27:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 14:27:56,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:56,506 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:56,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:27:56,506 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:56,507 INFO L82 PathProgramCache]: Analyzing trace with hash -728096078, now seen corresponding path program 16 times [2020-10-27 14:27:56,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:56,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571202969] [2020-10-27 14:27:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:01,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:01,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 14:28:01,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:28:01,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:28:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:28:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:28:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:01,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:01,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:01,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:01,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:01,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:01,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:01,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:01,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:01,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:01,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:01,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-10-27 14:28:01,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571202969] [2020-10-27 14:28:01,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:01,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:28:01,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946775799] [2020-10-27 14:28:01,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:28:01,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:01,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:28:01,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:28:01,888 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 20 states. [2020-10-27 14:28:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:02,300 INFO L93 Difference]: Finished difference Result 235 states and 252 transitions. [2020-10-27 14:28:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:28:02,301 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 121 [2020-10-27 14:28:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:02,302 INFO L225 Difference]: With dead ends: 235 [2020-10-27 14:28:02,302 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 14:28:02,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:28:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 14:28:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-27 14:28:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:28:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2020-10-27 14:28:02,318 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 121 [2020-10-27 14:28:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:02,318 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2020-10-27 14:28:02,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:28:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2020-10-27 14:28:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 14:28:02,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:02,320 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:02,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:28:02,321 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1170317519, now seen corresponding path program 17 times [2020-10-27 14:28:02,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:02,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181556693] [2020-10-27 14:28:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:02,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:07,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:07,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 14:28:07,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:07,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:28:07,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:07,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:28:07,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 14:28:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:28:07,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:07,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:07,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:07,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:07,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:07,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:07,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:07,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:07,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:07,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:07,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:07,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-10-27 14:28:07,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181556693] [2020-10-27 14:28:07,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:07,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:28:07,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179391867] [2020-10-27 14:28:07,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:28:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:28:07,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:28:07,736 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand 21 states. [2020-10-27 14:28:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:08,211 INFO L93 Difference]: Finished difference Result 246 states and 263 transitions. [2020-10-27 14:28:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:28:08,212 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 127 [2020-10-27 14:28:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:08,214 INFO L225 Difference]: With dead ends: 246 [2020-10-27 14:28:08,214 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 14:28:08,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:28:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 14:28:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-27 14:28:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 14:28:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2020-10-27 14:28:08,224 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 127 [2020-10-27 14:28:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:08,224 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2020-10-27 14:28:08,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:28:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2020-10-27 14:28:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 14:28:08,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:08,226 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:08,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:28:08,226 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash -263220526, now seen corresponding path program 18 times [2020-10-27 14:28:08,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:08,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730383066] [2020-10-27 14:28:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:08,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:13,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:13,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 14:28:13,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:13,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:28:13,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:13,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:28:13,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:28:13,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:28:13,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:13,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:13,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:13,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:13,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:13,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:13,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:13,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:13,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-10-27 14:28:13,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730383066] [2020-10-27 14:28:13,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:13,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:28:13,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007138901] [2020-10-27 14:28:13,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:28:13,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:28:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:28:13,681 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand 22 states. [2020-10-27 14:28:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:14,146 INFO L93 Difference]: Finished difference Result 257 states and 274 transitions. [2020-10-27 14:28:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:28:14,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 133 [2020-10-27 14:28:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:14,148 INFO L225 Difference]: With dead ends: 257 [2020-10-27 14:28:14,148 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 14:28:14,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:28:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 14:28:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-27 14:28:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 14:28:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 150 transitions. [2020-10-27 14:28:14,158 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 150 transitions. Word has length 133 [2020-10-27 14:28:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:14,158 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 150 transitions. [2020-10-27 14:28:14,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:28:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 150 transitions. [2020-10-27 14:28:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:28:14,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:14,159 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 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 14:28:14,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:28:14,159 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:14,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2142916817, now seen corresponding path program 19 times [2020-10-27 14:28:14,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:14,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604204397] [2020-10-27 14:28:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:14,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:19,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:19,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:28:19,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:19,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:28:19,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:19,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:28:19,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 14:28:19,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:28:19,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:19,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:19,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:19,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:19,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:19,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:19,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:19,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:19,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:19,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:19,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:19,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-27 14:28:19,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604204397] [2020-10-27 14:28:19,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:19,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:28:19,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819332571] [2020-10-27 14:28:19,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:28:19,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:19,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:28:19,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:19,608 INFO L87 Difference]: Start difference. First operand 144 states and 150 transitions. Second operand 23 states. [2020-10-27 14:28:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:20,104 INFO L93 Difference]: Finished difference Result 268 states and 285 transitions. [2020-10-27 14:28:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:28:20,104 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-10-27 14:28:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:20,106 INFO L225 Difference]: With dead ends: 268 [2020-10-27 14:28:20,106 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 14:28:20,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 14:28:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-27 14:28:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 14:28:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 156 transitions. [2020-10-27 14:28:20,120 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 156 transitions. Word has length 139 [2020-10-27 14:28:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:20,121 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 156 transitions. [2020-10-27 14:28:20,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:28:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 156 transitions. [2020-10-27 14:28:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 14:28:20,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:20,123 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 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 14:28:20,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:28:20,123 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:20,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1982514446, now seen corresponding path program 20 times [2020-10-27 14:28:20,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:20,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017385324] [2020-10-27 14:28:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:20,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:20,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:20,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:20,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:25,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:25,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 14:28:25,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:25,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:28:25,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:25,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:28:25,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:28:25,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:28:25,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:25,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:25,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:25,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:25,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:25,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:25,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:25,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:25,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:25,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:25,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-10-27 14:28:25,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017385324] [2020-10-27 14:28:25,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:25,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:28:25,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966127221] [2020-10-27 14:28:25,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:28:25,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:25,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:28:25,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:25,650 INFO L87 Difference]: Start difference. First operand 150 states and 156 transitions. Second operand 24 states. [2020-10-27 14:28:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:26,096 INFO L93 Difference]: Finished difference Result 279 states and 296 transitions. [2020-10-27 14:28:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:28:26,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2020-10-27 14:28:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:26,098 INFO L225 Difference]: With dead ends: 279 [2020-10-27 14:28:26,098 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:28:26,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:28:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-27 14:28:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 14:28:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2020-10-27 14:28:26,107 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 145 [2020-10-27 14:28:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:26,107 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2020-10-27 14:28:26,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:28:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2020-10-27 14:28:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 14:28:26,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:26,109 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 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 14:28:26,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:28:26,109 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash 665175439, now seen corresponding path program 21 times [2020-10-27 14:28:26,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:26,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593332022] [2020-10-27 14:28:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:26,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:26,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:26,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:31,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:31,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 14:28:31,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:31,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:28:31,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:31,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:28:31,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 14:28:31,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:28:31,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:31,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:31,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:31,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:31,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:31,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:31,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:31,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:31,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:31,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:31,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:31,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-27 14:28:31,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593332022] [2020-10-27 14:28:31,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:31,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:28:31,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795765499] [2020-10-27 14:28:31,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:28:31,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:28:31,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:31,671 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand 25 states. [2020-10-27 14:28:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:32,146 INFO L93 Difference]: Finished difference Result 290 states and 307 transitions. [2020-10-27 14:28:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:28:32,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 151 [2020-10-27 14:28:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:32,151 INFO L225 Difference]: With dead ends: 290 [2020-10-27 14:28:32,151 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 14:28:32,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:32,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 14:28:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-27 14:28:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 14:28:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 168 transitions. [2020-10-27 14:28:32,165 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 168 transitions. Word has length 151 [2020-10-27 14:28:32,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:32,166 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 168 transitions. [2020-10-27 14:28:32,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:28:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 168 transitions. [2020-10-27 14:28:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 14:28:32,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:32,169 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 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 14:28:32,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:28:32,173 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash 661199634, now seen corresponding path program 22 times [2020-10-27 14:28:32,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:32,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687343244] [2020-10-27 14:28:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:32,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:32,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:32,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:32,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:37,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:37,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 14:28:37,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:28:37,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:28:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:28:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:28:37,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:37,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:37,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:37,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:37,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:37,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:37,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:37,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:37,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:37,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:37,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-27 14:28:37,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687343244] [2020-10-27 14:28:37,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:37,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:28:37,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416382376] [2020-10-27 14:28:37,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:28:37,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:37,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:28:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:37,742 INFO L87 Difference]: Start difference. First operand 162 states and 168 transitions. Second operand 26 states. [2020-10-27 14:28:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:38,180 INFO L93 Difference]: Finished difference Result 301 states and 318 transitions. [2020-10-27 14:28:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:28:38,180 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-10-27 14:28:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:38,182 INFO L225 Difference]: With dead ends: 301 [2020-10-27 14:28:38,182 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:28:38,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:38,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:28:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-27 14:28:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 14:28:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2020-10-27 14:28:38,192 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 157 [2020-10-27 14:28:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:38,192 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2020-10-27 14:28:38,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:28:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2020-10-27 14:28:38,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 14:28:38,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:38,194 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 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 14:28:38,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:28:38,194 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:38,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:38,194 INFO L82 PathProgramCache]: Analyzing trace with hash -490478609, now seen corresponding path program 23 times [2020-10-27 14:28:38,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:38,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218891374] [2020-10-27 14:28:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:38,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:38,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:38,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:38,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:43,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:43,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 14:28:43,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:28:43,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:28:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 14:28:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:28:43,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:43,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:43,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:43,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:43,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:43,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:43,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:43,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:43,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:43,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:43,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:43,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2020-10-27 14:28:43,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218891374] [2020-10-27 14:28:43,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:43,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:28:43,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611994762] [2020-10-27 14:28:43,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:28:43,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:28:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:28:43,798 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 27 states. [2020-10-27 14:28:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:44,343 INFO L93 Difference]: Finished difference Result 312 states and 329 transitions. [2020-10-27 14:28:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:28:44,344 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 163 [2020-10-27 14:28:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:44,345 INFO L225 Difference]: With dead ends: 312 [2020-10-27 14:28:44,345 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 14:28:44,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:28:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 14:28:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-27 14:28:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 14:28:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2020-10-27 14:28:44,355 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 163 [2020-10-27 14:28:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:44,355 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2020-10-27 14:28:44,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:28:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2020-10-27 14:28:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 14:28:44,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:44,357 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 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 14:28:44,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:28:44,357 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1597426894, now seen corresponding path program 24 times [2020-10-27 14:28:44,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:44,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508548408] [2020-10-27 14:28:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:44,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:44,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:44,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:44,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:49,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:49,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 14:28:49,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:28:49,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:28:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 14:28:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:28:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:49,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:49,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:49,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:49,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:49,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:49,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:49,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:49,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:49,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:49,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:49,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2020-10-27 14:28:49,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508548408] [2020-10-27 14:28:49,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:49,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:28:49,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185500204] [2020-10-27 14:28:49,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:28:49,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:49,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:28:49,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:28:49,984 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand 28 states. [2020-10-27 14:28:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:50,600 INFO L93 Difference]: Finished difference Result 323 states and 340 transitions. [2020-10-27 14:28:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:28:50,602 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 169 [2020-10-27 14:28:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:50,603 INFO L225 Difference]: With dead ends: 323 [2020-10-27 14:28:50,603 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 14:28:50,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:28:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 14:28:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-27 14:28:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 14:28:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2020-10-27 14:28:50,614 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 169 [2020-10-27 14:28:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:50,615 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2020-10-27 14:28:50,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:28:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2020-10-27 14:28:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 14:28:50,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:50,616 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 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 14:28:50,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:28:50,616 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash 654445135, now seen corresponding path program 25 times [2020-10-27 14:28:50,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:50,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850409154] [2020-10-27 14:28:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:50,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:50,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:51,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:51,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:55,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:55,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 14:28:55,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:28:55,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 14:28:55,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:28:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-27 14:28:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:28:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:56,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:56,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:56,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:56,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:56,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:56,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:56,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:56,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2020-10-27 14:28:56,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850409154] [2020-10-27 14:28:56,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:56,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:28:56,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772598352] [2020-10-27 14:28:56,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:28:56,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:28:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:28:56,442 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand 29 states. [2020-10-27 14:28:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:57,077 INFO L93 Difference]: Finished difference Result 334 states and 351 transitions. [2020-10-27 14:28:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:28:57,077 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 175 [2020-10-27 14:28:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:57,079 INFO L225 Difference]: With dead ends: 334 [2020-10-27 14:28:57,079 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 14:28:57,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:28:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 14:28:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-27 14:28:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 14:28:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2020-10-27 14:28:57,088 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 175 [2020-10-27 14:28:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:57,088 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2020-10-27 14:28:57,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:28:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2020-10-27 14:28:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 14:28:57,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:57,090 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 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 14:28:57,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:28:57,090 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:57,090 INFO L82 PathProgramCache]: Analyzing trace with hash -13401262, now seen corresponding path program 26 times [2020-10-27 14:28:57,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:57,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810968409] [2020-10-27 14:28:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:57,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:57,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:02,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:02,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 14:29:02,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:02,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:29:02,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:02,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:29:02,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 14:29:02,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:29:02,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:02,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:02,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:02,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:02,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:02,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:02,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:02,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:02,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:02,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:02,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:02,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2020-10-27 14:29:02,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810968409] [2020-10-27 14:29:02,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:02,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:29:02,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643196916] [2020-10-27 14:29:02,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:29:02,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:02,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:29:02,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:29:02,812 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand 30 states. [2020-10-27 14:29:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:03,433 INFO L93 Difference]: Finished difference Result 345 states and 362 transitions. [2020-10-27 14:29:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:29:03,434 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 181 [2020-10-27 14:29:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:03,435 INFO L225 Difference]: With dead ends: 345 [2020-10-27 14:29:03,435 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 14:29:03,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:29:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 14:29:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-27 14:29:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 14:29:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 198 transitions. [2020-10-27 14:29:03,445 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 198 transitions. Word has length 181 [2020-10-27 14:29:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:03,445 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 198 transitions. [2020-10-27 14:29:03,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:29:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 198 transitions. [2020-10-27 14:29:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-27 14:29:03,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:03,447 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 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 14:29:03,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:29:03,447 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:03,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:03,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1480734895, now seen corresponding path program 27 times [2020-10-27 14:29:03,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:03,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010293668] [2020-10-27 14:29:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:03,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:03,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:03,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:04,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:08,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:08,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-27 14:29:08,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:08,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:29:08,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:08,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:29:08,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 14:29:08,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:29:08,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:09,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:09,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:09,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:09,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:09,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:09,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:29:09,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:09,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:09,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:09,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:09,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-27 14:29:09,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010293668] [2020-10-27 14:29:09,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:09,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:29:09,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518956493] [2020-10-27 14:29:09,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:29:09,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:09,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:29:09,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:29:09,283 INFO L87 Difference]: Start difference. First operand 192 states and 198 transitions. Second operand 31 states. [2020-10-27 14:29:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:09,893 INFO L93 Difference]: Finished difference Result 356 states and 373 transitions. [2020-10-27 14:29:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:29:09,894 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 187 [2020-10-27 14:29:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:09,896 INFO L225 Difference]: With dead ends: 356 [2020-10-27 14:29:09,896 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 14:29:09,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:29:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 14:29:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-27 14:29:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 14:29:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 204 transitions. [2020-10-27 14:29:09,906 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 204 transitions. Word has length 187 [2020-10-27 14:29:09,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:09,906 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 204 transitions. [2020-10-27 14:29:09,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:29:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 204 transitions. [2020-10-27 14:29:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-27 14:29:09,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:09,908 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 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 14:29:09,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:29:09,908 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:09,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1566968690, now seen corresponding path program 28 times [2020-10-27 14:29:09,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:09,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912642250] [2020-10-27 14:29:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:10,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:10,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:14,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:14,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-27 14:29:14,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:14,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:29:14,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:14,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:29:14,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 14:29:14,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:29:14,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:15,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:15,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:15,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:15,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:15,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-27 14:29:15,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912642250] [2020-10-27 14:29:15,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:15,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:29:15,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489084515] [2020-10-27 14:29:15,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:29:15,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:15,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:29:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:29:15,731 INFO L87 Difference]: Start difference. First operand 198 states and 204 transitions. Second operand 32 states. [2020-10-27 14:29:16,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:16,392 INFO L93 Difference]: Finished difference Result 367 states and 384 transitions. [2020-10-27 14:29:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:29:16,392 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 193 [2020-10-27 14:29:16,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:16,394 INFO L225 Difference]: With dead ends: 367 [2020-10-27 14:29:16,394 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 14:29:16,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:29:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 14:29:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-10-27 14:29:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-27 14:29:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 210 transitions. [2020-10-27 14:29:16,405 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 210 transitions. Word has length 193 [2020-10-27 14:29:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:16,406 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 210 transitions. [2020-10-27 14:29:16,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:29:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 210 transitions. [2020-10-27 14:29:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-27 14:29:16,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:16,408 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 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 14:29:16,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:29:16,408 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:16,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash -387551473, now seen corresponding path program 29 times [2020-10-27 14:29:16,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:16,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575693556] [2020-10-27 14:29:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:16,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:16,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:17,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:21,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:21,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-27 14:29:21,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:21,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:29:21,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:29:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-27 14:29:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:29:21,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:22,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:22,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:22,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:22,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:22,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:22,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:22,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:22,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:22,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:22,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2020-10-27 14:29:22,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575693556] [2020-10-27 14:29:22,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:22,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:29:22,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944739549] [2020-10-27 14:29:22,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:29:22,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:22,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:29:22,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:29:22,323 INFO L87 Difference]: Start difference. First operand 204 states and 210 transitions. Second operand 33 states. [2020-10-27 14:29:22,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:22,957 INFO L93 Difference]: Finished difference Result 378 states and 395 transitions. [2020-10-27 14:29:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:29:22,959 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 199 [2020-10-27 14:29:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:22,960 INFO L225 Difference]: With dead ends: 378 [2020-10-27 14:29:22,960 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 14:29:22,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:29:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 14:29:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2020-10-27 14:29:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-27 14:29:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 216 transitions. [2020-10-27 14:29:22,970 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 216 transitions. Word has length 199 [2020-10-27 14:29:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:22,970 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 216 transitions. [2020-10-27 14:29:22,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:29:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 216 transitions. [2020-10-27 14:29:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-27 14:29:22,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:22,972 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 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 14:29:22,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:29:22,972 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:22,972 INFO L82 PathProgramCache]: Analyzing trace with hash -945894510, now seen corresponding path program 30 times [2020-10-27 14:29:22,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:22,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592531190] [2020-10-27 14:29:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:23,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:23,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:23,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:23,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:28,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-27 14:29:28,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:28,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:29:28,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:28,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:29:28,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 14:29:28,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:29:28,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:28,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:28,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:28,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:28,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:28,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:28,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:28,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2020-10-27 14:29:28,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592531190] [2020-10-27 14:29:28,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:28,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:29:28,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871692755] [2020-10-27 14:29:28,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:29:28,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:29:28,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:29:28,916 INFO L87 Difference]: Start difference. First operand 210 states and 216 transitions. Second operand 34 states. [2020-10-27 14:29:29,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:29,675 INFO L93 Difference]: Finished difference Result 389 states and 406 transitions. [2020-10-27 14:29:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:29:29,676 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 205 [2020-10-27 14:29:29,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:29,678 INFO L225 Difference]: With dead ends: 389 [2020-10-27 14:29:29,679 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 14:29:29,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:29:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 14:29:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-27 14:29:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-27 14:29:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 222 transitions. [2020-10-27 14:29:29,689 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 222 transitions. Word has length 205 [2020-10-27 14:29:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:29,689 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 222 transitions. [2020-10-27 14:29:29,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:29:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 222 transitions. [2020-10-27 14:29:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 14:29:29,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:29,691 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 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 14:29:29,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:29:29,691 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:29,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2043719023, now seen corresponding path program 31 times [2020-10-27 14:29:29,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:29,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546115462] [2020-10-27 14:29:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:29,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:29,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:30,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:30,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:34,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:34,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 14:29:34,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:34,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 14:29:34,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:34,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:29:34,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-27 14:29:34,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:29:34,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:35,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:35,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:35,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:35,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:35,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:35,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:35,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:35,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:35,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:35,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:35,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-10-27 14:29:35,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546115462] [2020-10-27 14:29:35,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:35,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:29:35,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151794147] [2020-10-27 14:29:35,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:29:35,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:29:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:29:35,685 INFO L87 Difference]: Start difference. First operand 216 states and 222 transitions. Second operand 35 states. [2020-10-27 14:29:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:36,377 INFO L93 Difference]: Finished difference Result 400 states and 417 transitions. [2020-10-27 14:29:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:29:36,377 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 211 [2020-10-27 14:29:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:36,380 INFO L225 Difference]: With dead ends: 400 [2020-10-27 14:29:36,380 INFO L226 Difference]: Without dead ends: 222 [2020-10-27 14:29:36,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:29:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-27 14:29:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2020-10-27 14:29:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 14:29:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 228 transitions. [2020-10-27 14:29:36,390 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 228 transitions. Word has length 211 [2020-10-27 14:29:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:36,391 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 228 transitions. [2020-10-27 14:29:36,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:29:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 228 transitions. [2020-10-27 14:29:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-27 14:29:36,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:36,392 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 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 14:29:36,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:29:36,392 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:36,393 INFO L82 PathProgramCache]: Analyzing trace with hash 463193010, now seen corresponding path program 32 times [2020-10-27 14:29:36,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:36,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973854651] [2020-10-27 14:29:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:36,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:37,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:41,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:41,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-27 14:29:41,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:41,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 14:29:41,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:41,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:29:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 14:29:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:29:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 30 [2020-10-27 14:29:42,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:42,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:42,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:42,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:42,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:42,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:42,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:42,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:42,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:42,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:42,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2020-10-27 14:29:42,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973854651] [2020-10-27 14:29:42,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:42,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:29:42,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550954154] [2020-10-27 14:29:42,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:29:42,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:29:42,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:29:42,491 INFO L87 Difference]: Start difference. First operand 222 states and 228 transitions. Second operand 36 states. [2020-10-27 14:29:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:43,282 INFO L93 Difference]: Finished difference Result 411 states and 428 transitions. [2020-10-27 14:29:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:29:43,282 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 217 [2020-10-27 14:29:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:43,284 INFO L225 Difference]: With dead ends: 411 [2020-10-27 14:29:43,284 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 14:29:43,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:29:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 14:29:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-27 14:29:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-27 14:29:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 234 transitions. [2020-10-27 14:29:43,297 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 234 transitions. Word has length 217 [2020-10-27 14:29:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:43,297 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 234 transitions. [2020-10-27 14:29:43,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:29:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 234 transitions. [2020-10-27 14:29:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-27 14:29:43,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:43,299 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 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 14:29:43,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:29:43,299 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:43,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:43,300 INFO L82 PathProgramCache]: Analyzing trace with hash -94178353, now seen corresponding path program 33 times [2020-10-27 14:29:43,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:43,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478702786] [2020-10-27 14:29:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:43,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:43,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:43,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:44,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:48,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:48,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-27 14:29:48,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:48,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:29:48,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:48,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:29:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-27 14:29:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:29:48,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:49,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:49,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:49,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:49,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:49,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:49,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:49,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:49,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2020-10-27 14:29:49,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478702786] [2020-10-27 14:29:49,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:49,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:29:49,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653351789] [2020-10-27 14:29:49,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:29:49,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:49,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:29:49,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:29:49,422 INFO L87 Difference]: Start difference. First operand 228 states and 234 transitions. Second operand 37 states. [2020-10-27 14:29:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:50,265 INFO L93 Difference]: Finished difference Result 422 states and 439 transitions. [2020-10-27 14:29:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:29:50,268 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 223 [2020-10-27 14:29:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:50,270 INFO L225 Difference]: With dead ends: 422 [2020-10-27 14:29:50,270 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 14:29:50,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:29:50,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 14:29:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-10-27 14:29:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 14:29:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 240 transitions. [2020-10-27 14:29:50,279 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 240 transitions. Word has length 223 [2020-10-27 14:29:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:50,279 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 240 transitions. [2020-10-27 14:29:50,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:29:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 240 transitions. [2020-10-27 14:29:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-27 14:29:50,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:50,281 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 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 14:29:50,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:29:50,281 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:50,281 INFO L82 PathProgramCache]: Analyzing trace with hash -392498222, now seen corresponding path program 34 times [2020-10-27 14:29:50,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:50,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272396367] [2020-10-27 14:29:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:50,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:50,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:51,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:55,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:55,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-27 14:29:55,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:29:55,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-27 14:29:55,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:29:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-27 14:29:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:29:55,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:56,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:56,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:56,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:56,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:56,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:56,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:56,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:56,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:56,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:56,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:56,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2975 trivial. 0 not checked. [2020-10-27 14:29:56,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272396367] [2020-10-27 14:29:56,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:56,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:29:56,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850550212] [2020-10-27 14:29:56,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:29:56,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:29:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:29:56,479 INFO L87 Difference]: Start difference. First operand 234 states and 240 transitions. Second operand 38 states. [2020-10-27 14:29:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:57,154 INFO L93 Difference]: Finished difference Result 433 states and 450 transitions. [2020-10-27 14:29:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:29:57,155 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 229 [2020-10-27 14:29:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:57,156 INFO L225 Difference]: With dead ends: 433 [2020-10-27 14:29:57,156 INFO L226 Difference]: Without dead ends: 240 [2020-10-27 14:29:57,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:29:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-27 14:29:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-10-27 14:29:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-27 14:29:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 246 transitions. [2020-10-27 14:29:57,167 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 246 transitions. Word has length 229 [2020-10-27 14:29:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:57,167 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 246 transitions. [2020-10-27 14:29:57,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:29:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 246 transitions. [2020-10-27 14:29:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-27 14:29:57,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:57,169 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 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 14:29:57,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:29:57,169 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash -931184081, now seen corresponding path program 35 times [2020-10-27 14:29:57,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:57,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191780491] [2020-10-27 14:29:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:57,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:58,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:02,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:02,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 14:30:02,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:02,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:30:02,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:30:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 122 [2020-10-27 14:30:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:30:02,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:03,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:03,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:03,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:03,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:03,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:03,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:03,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:03,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3150 trivial. 0 not checked. [2020-10-27 14:30:03,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191780491] [2020-10-27 14:30:03,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:03,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:30:03,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202385514] [2020-10-27 14:30:03,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:30:03,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:03,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:30:03,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:30:03,424 INFO L87 Difference]: Start difference. First operand 240 states and 246 transitions. Second operand 39 states. [2020-10-27 14:30:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:04,117 INFO L93 Difference]: Finished difference Result 444 states and 461 transitions. [2020-10-27 14:30:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:30:04,117 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 235 [2020-10-27 14:30:04,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:04,119 INFO L225 Difference]: With dead ends: 444 [2020-10-27 14:30:04,119 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 14:30:04,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:30:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 14:30:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2020-10-27 14:30:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-27 14:30:04,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 252 transitions. [2020-10-27 14:30:04,129 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 252 transitions. Word has length 235 [2020-10-27 14:30:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:04,129 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 252 transitions. [2020-10-27 14:30:04,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:30:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 252 transitions. [2020-10-27 14:30:04,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-27 14:30:04,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:04,131 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 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 14:30:04,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:30:04,131 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:04,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1331321842, now seen corresponding path program 36 times [2020-10-27 14:30:04,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:04,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338750645] [2020-10-27 14:30:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:09,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:09,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-27 14:30:09,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:09,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 14:30:09,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:30:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-27 14:30:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:30:09,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:10,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:10,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:10,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:10,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:10,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:10,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:10,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3996 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3330 trivial. 0 not checked. [2020-10-27 14:30:10,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338750645] [2020-10-27 14:30:10,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:10,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:30:10,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73830902] [2020-10-27 14:30:10,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:30:10,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:10,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:30:10,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:30:10,408 INFO L87 Difference]: Start difference. First operand 246 states and 252 transitions. Second operand 40 states. [2020-10-27 14:30:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:11,313 INFO L93 Difference]: Finished difference Result 455 states and 472 transitions. [2020-10-27 14:30:11,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:30:11,314 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 241 [2020-10-27 14:30:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:11,316 INFO L225 Difference]: With dead ends: 455 [2020-10-27 14:30:11,316 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 14:30:11,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:30:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 14:30:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-10-27 14:30:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 14:30:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 258 transitions. [2020-10-27 14:30:11,327 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 258 transitions. Word has length 241 [2020-10-27 14:30:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:11,327 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 258 transitions. [2020-10-27 14:30:11,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:30:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 258 transitions. [2020-10-27 14:30:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-27 14:30:11,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:11,329 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 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 14:30:11,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:30:11,330 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash -796419953, now seen corresponding path program 37 times [2020-10-27 14:30:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:11,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577332228] [2020-10-27 14:30:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:11,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:11,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:12,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:12,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-27 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:30:16,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-27 14:30:16,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:30:16,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:17,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:17,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:17,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:17,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:17,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:17,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:17,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-10-27 14:30:17,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577332228] [2020-10-27 14:30:17,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:17,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:30:17,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461454081] [2020-10-27 14:30:17,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:30:17,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:17,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:30:17,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:30:17,776 INFO L87 Difference]: Start difference. First operand 252 states and 258 transitions. Second operand 41 states. [2020-10-27 14:30:18,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:18,717 INFO L93 Difference]: Finished difference Result 466 states and 483 transitions. [2020-10-27 14:30:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:30:18,718 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 247 [2020-10-27 14:30:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:18,720 INFO L225 Difference]: With dead ends: 466 [2020-10-27 14:30:18,720 INFO L226 Difference]: Without dead ends: 258 [2020-10-27 14:30:18,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:30:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-27 14:30:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2020-10-27 14:30:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-27 14:30:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 264 transitions. [2020-10-27 14:30:18,730 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 264 transitions. Word has length 247 [2020-10-27 14:30:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:18,731 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 264 transitions. [2020-10-27 14:30:18,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:30:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 264 transitions. [2020-10-27 14:30:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-27 14:30:18,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:18,732 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 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 14:30:18,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:30:18,733 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:18,733 INFO L82 PathProgramCache]: Analyzing trace with hash -501744622, now seen corresponding path program 38 times [2020-10-27 14:30:18,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:18,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421479562] [2020-10-27 14:30:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:18,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:19,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:19,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:19,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:23,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:23,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-27 14:30:23,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:23,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-27 14:30:23,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:23,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:30:23,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-27 14:30:23,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:30:23,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0