/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:53:15,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:53:15,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:53:15,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:53:15,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:53:15,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:53:15,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:53:15,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:53:15,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:53:15,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:53:15,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:53:15,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:53:15,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:53:15,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:53:15,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:53:15,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:53:15,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:53:15,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:53:15,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:53:15,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:53:15,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:53:15,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:53:15,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:53:15,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:53:15,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:53:15,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:53:15,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:53:15,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:53:15,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:53:15,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:53:15,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:53:15,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:53:15,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:53:15,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:53:15,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:53:15,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:53:15,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:53:15,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:53:15,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:53:15,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:53:15,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:53:15,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:53:15,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:53:15,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:53:15,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:53:15,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:53:15,747 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:53:15,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:53:15,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:53:15,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:53:15,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:53:15,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:53:15,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:53:15,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:53:15,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:53:15,751 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:53:15,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:53:15,751 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:53:15,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:53:15,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:53:15,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:53:15,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:53:15,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:53:15,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:15,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:53:15,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:53:15,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:53:15,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:53:15,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:53:15,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:53:15,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:53:15,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:53:16,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:53:16,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:53:16,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:53:16,203 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:53:16,204 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:53:16,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-10-28 14:53:16,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57a06f745/8f7b61c4a10540a6b5f384f8fc12b899/FLAG1f6e04417 [2020-10-28 14:53:17,081 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:53:17,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-10-28 14:53:17,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57a06f745/8f7b61c4a10540a6b5f384f8fc12b899/FLAG1f6e04417 [2020-10-28 14:53:17,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57a06f745/8f7b61c4a10540a6b5f384f8fc12b899 [2020-10-28 14:53:17,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:53:17,456 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:53:17,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:17,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:53:17,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:53:17,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:17" (1/1) ... [2020-10-28 14:53:17,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@554be6e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17, skipping insertion in model container [2020-10-28 14:53:17,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:17" (1/1) ... [2020-10-28 14:53:17,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:53:17,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:53:17,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:17,692 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:53:17,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:17,737 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:53:17,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17 WrapperNode [2020-10-28 14:53:17,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:17,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:53:17,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:53:17,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:53:17,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17" (1/1) ... [2020-10-28 14:53:17,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17" (1/1) ... [2020-10-28 14:53:17,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17" (1/1) ... [2020-10-28 14:53:17,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17" (1/1) ... [2020-10-28 14:53:17,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17" (1/1) ... [2020-10-28 14:53:17,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17" (1/1) ... [2020-10-28 14:53:17,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17" (1/1) ... [2020-10-28 14:53:17,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:53:17,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:53:17,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:53:17,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:53:17,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:17,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:53:17,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:53:17,882 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:53:17,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:53:17,883 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:53:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:53:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:53:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:53:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:53:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:53:17,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:53:17,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:53:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:53:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:53:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:53:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:53:18,595 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:53:18,596 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:53:18,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:18 BoogieIcfgContainer [2020-10-28 14:53:18,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:53:18,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:53:18,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:53:18,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:53:18,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:53:17" (1/3) ... [2020-10-28 14:53:18,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fbb8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:18, skipping insertion in model container [2020-10-28 14:53:18,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:17" (2/3) ... [2020-10-28 14:53:18,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fbb8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:18, skipping insertion in model container [2020-10-28 14:53:18,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:18" (3/3) ... [2020-10-28 14:53:18,608 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-10-28 14:53:18,622 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:53:18,629 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:53:18,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:53:18,676 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:53:18,676 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:53:18,677 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:53:18,677 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:53:18,677 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:53:18,677 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:53:18,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:53:18,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:53:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-28 14:53:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:53:18,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:18,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:18,704 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:18,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1356734652, now seen corresponding path program 1 times [2020-10-28 14:53:18,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:18,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620658675] [2020-10-28 14:53:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:53:19,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-28 14:53:19,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:53:19,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:53:19,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:19,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:19,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:53:19,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:19,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:19,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620658675] [2020-10-28 14:53:19,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:19,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:19,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865449577] [2020-10-28 14:53:19,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:19,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:19,332 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-28 14:53:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:19,558 INFO L93 Difference]: Finished difference Result 74 states and 121 transitions. [2020-10-28 14:53:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:19,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 14:53:19,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:19,573 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:53:19,573 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:53:19,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:53:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-28 14:53:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:53:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 67 transitions. [2020-10-28 14:53:19,636 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 67 transitions. Word has length 19 [2020-10-28 14:53:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:19,636 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 67 transitions. [2020-10-28 14:53:19,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 67 transitions. [2020-10-28 14:53:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:53:19,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:19,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:19,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:53:19,639 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:19,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2057799230, now seen corresponding path program 1 times [2020-10-28 14:53:19,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:19,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770435615] [2020-10-28 14:53:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:53:19,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:19,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-28 14:53:19,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:19,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:19,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:19,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:53:19,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:19,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:19,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:19,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:19,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770435615] [2020-10-28 14:53:19,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:19,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:19,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917173655] [2020-10-28 14:53:19,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:19,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:19,917 INFO L87 Difference]: Start difference. First operand 40 states and 67 transitions. Second operand 4 states. [2020-10-28 14:53:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:20,110 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2020-10-28 14:53:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:20,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 14:53:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:20,115 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:53:20,115 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:53:20,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:53:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-28 14:53:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:53:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 91 transitions. [2020-10-28 14:53:20,129 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 91 transitions. Word has length 19 [2020-10-28 14:53:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:20,130 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 91 transitions. [2020-10-28 14:53:20,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 91 transitions. [2020-10-28 14:53:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:53:20,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:20,131 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] [2020-10-28 14:53:20,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:53:20,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash -884260222, now seen corresponding path program 1 times [2020-10-28 14:53:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:20,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137452613] [2020-10-28 14:53:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:53:20,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:20,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-28 14:53:20,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:53:20,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:20,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:53:20,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:20,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:20,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:53:20,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:20,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:20,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:20,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137452613] [2020-10-28 14:53:20,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:20,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:20,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684194304] [2020-10-28 14:53:20,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:20,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:20,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:20,442 INFO L87 Difference]: Start difference. First operand 54 states and 91 transitions. Second operand 4 states. [2020-10-28 14:53:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:20,623 INFO L93 Difference]: Finished difference Result 146 states and 256 transitions. [2020-10-28 14:53:20,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:20,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:53:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:20,625 INFO L225 Difference]: With dead ends: 146 [2020-10-28 14:53:20,625 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:53:20,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:53:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-28 14:53:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 14:53:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 166 transitions. [2020-10-28 14:53:20,642 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 166 transitions. Word has length 20 [2020-10-28 14:53:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:20,643 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 166 transitions. [2020-10-28 14:53:20,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 166 transitions. [2020-10-28 14:53:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:53:20,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:20,644 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] [2020-10-28 14:53:20,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:53:20,645 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1585324800, now seen corresponding path program 1 times [2020-10-28 14:53:20,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:20,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111484802] [2020-10-28 14:53:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:53:20,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:20,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 14:53:20,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:20,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:53:20,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:53:20,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:20,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:20,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:20,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:20,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:20,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:20,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:20,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:20,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111484802] [2020-10-28 14:53:20,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:20,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:20,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10045101] [2020-10-28 14:53:20,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:20,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:20,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:20,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:20,906 INFO L87 Difference]: Start difference. First operand 97 states and 166 transitions. Second operand 4 states. [2020-10-28 14:53:21,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:21,057 INFO L93 Difference]: Finished difference Result 125 states and 213 transitions. [2020-10-28 14:53:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:21,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:53:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:21,059 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:53:21,060 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 14:53:21,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 14:53:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-10-28 14:53:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 14:53:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 164 transitions. [2020-10-28 14:53:21,076 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 164 transitions. Word has length 20 [2020-10-28 14:53:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:21,076 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 164 transitions. [2020-10-28 14:53:21,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 164 transitions. [2020-10-28 14:53:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:53:21,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:21,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:21,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:53:21,079 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:21,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1635614009, now seen corresponding path program 1 times [2020-10-28 14:53:21,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:21,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073453060] [2020-10-28 14:53:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:21,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:53:21,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:21,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 14:53:21,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:21,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:21,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:53:21,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:21,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:21,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:21,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:21,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:21,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:21,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:21,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:21,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:21,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073453060] [2020-10-28 14:53:21,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:21,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:21,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904980156] [2020-10-28 14:53:21,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:21,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:21,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:21,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:21,257 INFO L87 Difference]: Start difference. First operand 97 states and 164 transitions. Second operand 4 states. [2020-10-28 14:53:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:21,379 INFO L93 Difference]: Finished difference Result 177 states and 303 transitions. [2020-10-28 14:53:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:21,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:53:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:21,382 INFO L225 Difference]: With dead ends: 177 [2020-10-28 14:53:21,383 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 14:53:21,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 14:53:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 133. [2020-10-28 14:53:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 14:53:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 224 transitions. [2020-10-28 14:53:21,399 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 224 transitions. Word has length 21 [2020-10-28 14:53:21,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:21,399 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 224 transitions. [2020-10-28 14:53:21,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 224 transitions. [2020-10-28 14:53:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:53:21,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:21,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:21,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:53:21,402 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:21,402 INFO L82 PathProgramCache]: Analyzing trace with hash -934549431, now seen corresponding path program 1 times [2020-10-28 14:53:21,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:21,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309416009] [2020-10-28 14:53:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:21,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:53:21,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:21,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-28 14:53:21,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:21,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:21,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:21,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:21,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:21,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:53:21,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:21,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:53:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:21,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309416009] [2020-10-28 14:53:21,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:21,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:21,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909098272] [2020-10-28 14:53:21,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:21,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:21,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:21,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:21,611 INFO L87 Difference]: Start difference. First operand 133 states and 224 transitions. Second operand 4 states. [2020-10-28 14:53:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:21,954 INFO L93 Difference]: Finished difference Result 309 states and 527 transitions. [2020-10-28 14:53:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:21,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:53:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:21,957 INFO L225 Difference]: With dead ends: 309 [2020-10-28 14:53:21,957 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 14:53:21,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 14:53:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-28 14:53:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-28 14:53:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 300 transitions. [2020-10-28 14:53:21,997 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 300 transitions. Word has length 21 [2020-10-28 14:53:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:21,997 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 300 transitions. [2020-10-28 14:53:21,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 300 transitions. [2020-10-28 14:53:22,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:53:22,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:22,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:22,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:53:22,002 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:22,003 INFO L82 PathProgramCache]: Analyzing trace with hash 842232941, now seen corresponding path program 1 times [2020-10-28 14:53:22,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:22,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404363627] [2020-10-28 14:53:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:22,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:22,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:53:22,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:22,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-28 14:53:22,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:22,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:22,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:53:22,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:22,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:22,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:22,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:22,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:22,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:53:22,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:22,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:22,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:22,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:22,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:22,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404363627] [2020-10-28 14:53:22,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:22,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:22,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493832670] [2020-10-28 14:53:22,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:22,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:22,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:22,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:22,307 INFO L87 Difference]: Start difference. First operand 181 states and 300 transitions. Second operand 4 states. [2020-10-28 14:53:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:22,449 INFO L93 Difference]: Finished difference Result 325 states and 543 transitions. [2020-10-28 14:53:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:22,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 14:53:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:22,452 INFO L225 Difference]: With dead ends: 325 [2020-10-28 14:53:22,452 INFO L226 Difference]: Without dead ends: 322 [2020-10-28 14:53:22,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-28 14:53:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 257. [2020-10-28 14:53:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-28 14:53:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 420 transitions. [2020-10-28 14:53:22,469 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 420 transitions. Word has length 22 [2020-10-28 14:53:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:22,470 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 420 transitions. [2020-10-28 14:53:22,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 420 transitions. [2020-10-28 14:53:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:53:22,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:22,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:22,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:53:22,472 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1543297519, now seen corresponding path program 1 times [2020-10-28 14:53:22,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:22,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731265301] [2020-10-28 14:53:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:22,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:22,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:53:22,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:22,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-28 14:53:22,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:22,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:22,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:22,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:22,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:22,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:22,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:22,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:53:22,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:22,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:22,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:53:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:22,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731265301] [2020-10-28 14:53:22,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:22,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:22,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071437093] [2020-10-28 14:53:22,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:22,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:22,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:22,728 INFO L87 Difference]: Start difference. First operand 257 states and 420 transitions. Second operand 4 states. [2020-10-28 14:53:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:22,889 INFO L93 Difference]: Finished difference Result 384 states and 623 transitions. [2020-10-28 14:53:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:22,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 14:53:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:22,892 INFO L225 Difference]: With dead ends: 384 [2020-10-28 14:53:22,892 INFO L226 Difference]: Without dead ends: 261 [2020-10-28 14:53:22,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-28 14:53:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2020-10-28 14:53:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-28 14:53:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 412 transitions. [2020-10-28 14:53:22,911 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 412 transitions. Word has length 22 [2020-10-28 14:53:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:22,911 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 412 transitions. [2020-10-28 14:53:22,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 412 transitions. [2020-10-28 14:53:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:53:22,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:22,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:22,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:53:22,915 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:22,915 INFO L82 PathProgramCache]: Analyzing trace with hash 532180269, now seen corresponding path program 1 times [2020-10-28 14:53:22,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:22,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579485919] [2020-10-28 14:53:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:22,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:23,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:53:23,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:23,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-28 14:53:23,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:23,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:23,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:23,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:23,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:23,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:23,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:23,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:23,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:23,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:23,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:23,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:23,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:23,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:23,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579485919] [2020-10-28 14:53:23,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:23,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:23,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446116950] [2020-10-28 14:53:23,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:23,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:23,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:23,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:23,096 INFO L87 Difference]: Start difference. First operand 260 states and 412 transitions. Second operand 4 states. [2020-10-28 14:53:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:23,245 INFO L93 Difference]: Finished difference Result 600 states and 959 transitions. [2020-10-28 14:53:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:23,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 14:53:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:23,248 INFO L225 Difference]: With dead ends: 600 [2020-10-28 14:53:23,248 INFO L226 Difference]: Without dead ends: 349 [2020-10-28 14:53:23,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-28 14:53:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 348. [2020-10-28 14:53:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-28 14:53:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 540 transitions. [2020-10-28 14:53:23,266 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 540 transitions. Word has length 22 [2020-10-28 14:53:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:23,267 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 540 transitions. [2020-10-28 14:53:23,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 540 transitions. [2020-10-28 14:53:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:53:23,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:23,268 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] [2020-10-28 14:53:23,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:53:23,269 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash -933776044, now seen corresponding path program 1 times [2020-10-28 14:53:23,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:23,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083590417] [2020-10-28 14:53:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:23,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:53:23,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:23,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-28 14:53:23,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:23,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:23,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:23,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:23,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:53:23,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:23,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:23,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:23,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:23,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:23,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:23,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:23,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:23,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:23,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:23,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:23,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:23,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083590417] [2020-10-28 14:53:23,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:23,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:23,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150289573] [2020-10-28 14:53:23,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:23,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:23,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:23,485 INFO L87 Difference]: Start difference. First operand 348 states and 540 transitions. Second operand 4 states. [2020-10-28 14:53:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:23,635 INFO L93 Difference]: Finished difference Result 608 states and 951 transitions. [2020-10-28 14:53:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:23,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 14:53:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:23,639 INFO L225 Difference]: With dead ends: 608 [2020-10-28 14:53:23,639 INFO L226 Difference]: Without dead ends: 605 [2020-10-28 14:53:23,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-10-28 14:53:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 508. [2020-10-28 14:53:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-28 14:53:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 772 transitions. [2020-10-28 14:53:23,664 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 772 transitions. Word has length 23 [2020-10-28 14:53:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:23,666 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 772 transitions. [2020-10-28 14:53:23,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 772 transitions. [2020-10-28 14:53:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:53:23,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:23,668 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] [2020-10-28 14:53:23,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:53:23,669 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash -232711466, now seen corresponding path program 1 times [2020-10-28 14:53:23,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:23,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279105613] [2020-10-28 14:53:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:23,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:23,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:53:23,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:23,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-28 14:53:23,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:23,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:23,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:23,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:23,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:23,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:23,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:23,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:23,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:23,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:23,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:23,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:23,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:23,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:23,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279105613] [2020-10-28 14:53:23,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:23,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:23,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557917843] [2020-10-28 14:53:23,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:23,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:23,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:23,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:23,901 INFO L87 Difference]: Start difference. First operand 508 states and 772 transitions. Second operand 4 states. [2020-10-28 14:53:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:24,061 INFO L93 Difference]: Finished difference Result 758 states and 1147 transitions. [2020-10-28 14:53:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:24,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 14:53:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:24,065 INFO L225 Difference]: With dead ends: 758 [2020-10-28 14:53:24,066 INFO L226 Difference]: Without dead ends: 515 [2020-10-28 14:53:24,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:24,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-28 14:53:24,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 514. [2020-10-28 14:53:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-28 14:53:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 760 transitions. [2020-10-28 14:53:24,094 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 760 transitions. Word has length 23 [2020-10-28 14:53:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:24,096 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 760 transitions. [2020-10-28 14:53:24,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 760 transitions. [2020-10-28 14:53:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:53:24,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:24,098 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] [2020-10-28 14:53:24,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:53:24,098 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:24,099 INFO L82 PathProgramCache]: Analyzing trace with hash -819517480, now seen corresponding path program 1 times [2020-10-28 14:53:24,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:24,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972548871] [2020-10-28 14:53:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:24,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:24,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:53:24,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:24,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-28 14:53:24,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:24,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:24,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:24,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:24,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:24,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:24,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:24,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:24,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:24,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:24,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:24,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:24,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:24,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:24,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972548871] [2020-10-28 14:53:24,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:24,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:24,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221877665] [2020-10-28 14:53:24,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:24,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:24,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:24,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:24,263 INFO L87 Difference]: Start difference. First operand 514 states and 760 transitions. Second operand 4 states. [2020-10-28 14:53:24,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:24,411 INFO L93 Difference]: Finished difference Result 1174 states and 1739 transitions. [2020-10-28 14:53:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:24,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 14:53:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:24,416 INFO L225 Difference]: With dead ends: 1174 [2020-10-28 14:53:24,416 INFO L226 Difference]: Without dead ends: 675 [2020-10-28 14:53:24,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-10-28 14:53:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 674. [2020-10-28 14:53:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 674 states. [2020-10-28 14:53:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 968 transitions. [2020-10-28 14:53:24,449 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 968 transitions. Word has length 23 [2020-10-28 14:53:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:24,450 INFO L481 AbstractCegarLoop]: Abstraction has 674 states and 968 transitions. [2020-10-28 14:53:24,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 968 transitions. [2020-10-28 14:53:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:53:24,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:24,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:24,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:53:24,455 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:24,456 INFO L82 PathProgramCache]: Analyzing trace with hash 113277268, now seen corresponding path program 1 times [2020-10-28 14:53:24,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:24,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950158583] [2020-10-28 14:53:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:24,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:24,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:53:24,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:24,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-28 14:53:24,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:24,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:24,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:24,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:24,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:53:24,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:24,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:24,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:24,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:24,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:24,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:24,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:24,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:24,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:24,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950158583] [2020-10-28 14:53:24,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:24,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:24,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10107061] [2020-10-28 14:53:24,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:24,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:24,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:24,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:24,641 INFO L87 Difference]: Start difference. First operand 674 states and 968 transitions. Second operand 4 states. [2020-10-28 14:53:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:24,802 INFO L93 Difference]: Finished difference Result 1142 states and 1643 transitions. [2020-10-28 14:53:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:24,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-28 14:53:24,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:24,808 INFO L225 Difference]: With dead ends: 1142 [2020-10-28 14:53:24,809 INFO L226 Difference]: Without dead ends: 1139 [2020-10-28 14:53:24,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-10-28 14:53:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1010. [2020-10-28 14:53:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-10-28 14:53:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1416 transitions. [2020-10-28 14:53:24,867 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1416 transitions. Word has length 24 [2020-10-28 14:53:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:24,867 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1416 transitions. [2020-10-28 14:53:24,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1416 transitions. [2020-10-28 14:53:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:53:24,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:24,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:24,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:53:24,870 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash 814341846, now seen corresponding path program 1 times [2020-10-28 14:53:24,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:24,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113577366] [2020-10-28 14:53:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:24,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:25,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:53:25,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:25,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 14:53:25,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:25,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:25,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:25,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:25,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:25,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:25,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:25,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:25,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:25,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:25,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:25,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:25,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:25,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:25,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:25,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113577366] [2020-10-28 14:53:25,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:25,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:25,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888811960] [2020-10-28 14:53:25,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:25,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:25,085 INFO L87 Difference]: Start difference. First operand 1010 states and 1416 transitions. Second operand 4 states. [2020-10-28 14:53:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:25,228 INFO L93 Difference]: Finished difference Result 1502 states and 2091 transitions. [2020-10-28 14:53:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:25,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-28 14:53:25,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:25,235 INFO L225 Difference]: With dead ends: 1502 [2020-10-28 14:53:25,235 INFO L226 Difference]: Without dead ends: 1019 [2020-10-28 14:53:25,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2020-10-28 14:53:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1018. [2020-10-28 14:53:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1018 states. [2020-10-28 14:53:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1384 transitions. [2020-10-28 14:53:25,280 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1384 transitions. Word has length 24 [2020-10-28 14:53:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:25,280 INFO L481 AbstractCegarLoop]: Abstraction has 1018 states and 1384 transitions. [2020-10-28 14:53:25,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1384 transitions. [2020-10-28 14:53:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:53:25,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:25,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:25,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:53:25,283 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:25,284 INFO L82 PathProgramCache]: Analyzing trace with hash 227535832, now seen corresponding path program 1 times [2020-10-28 14:53:25,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:25,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883617013] [2020-10-28 14:53:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:25,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:25,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:53:25,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:25,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 14:53:25,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:25,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:25,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:25,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:25,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:25,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:25,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:25,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:25,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:25,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:25,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:25,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883617013] [2020-10-28 14:53:25,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:25,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:25,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646936908] [2020-10-28 14:53:25,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:25,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:25,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:25,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:25,418 INFO L87 Difference]: Start difference. First operand 1018 states and 1384 transitions. Second operand 4 states. [2020-10-28 14:53:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:25,580 INFO L93 Difference]: Finished difference Result 1518 states and 2051 transitions. [2020-10-28 14:53:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:25,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-28 14:53:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:25,588 INFO L225 Difference]: With dead ends: 1518 [2020-10-28 14:53:25,588 INFO L226 Difference]: Without dead ends: 1035 [2020-10-28 14:53:25,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-10-28 14:53:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1034. [2020-10-28 14:53:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-10-28 14:53:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1368 transitions. [2020-10-28 14:53:25,630 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1368 transitions. Word has length 24 [2020-10-28 14:53:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:25,630 INFO L481 AbstractCegarLoop]: Abstraction has 1034 states and 1368 transitions. [2020-10-28 14:53:25,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1368 transitions. [2020-10-28 14:53:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:53:25,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:25,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:25,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:53:25,634 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:25,635 INFO L82 PathProgramCache]: Analyzing trace with hash 485701270, now seen corresponding path program 1 times [2020-10-28 14:53:25,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:25,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385494798] [2020-10-28 14:53:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:25,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:25,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:53:25,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:25,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 14:53:25,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:25,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:25,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:25,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:25,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:25,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:25,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:25,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:25,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:25,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:25,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:53:25,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:25,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:25,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:25,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:25,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:25,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:25,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385494798] [2020-10-28 14:53:25,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:25,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:25,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375665537] [2020-10-28 14:53:25,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:25,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:25,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:25,743 INFO L87 Difference]: Start difference. First operand 1034 states and 1368 transitions. Second operand 4 states. [2020-10-28 14:53:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:25,920 INFO L93 Difference]: Finished difference Result 2318 states and 3035 transitions. [2020-10-28 14:53:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:25,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-28 14:53:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:25,927 INFO L225 Difference]: With dead ends: 2318 [2020-10-28 14:53:25,927 INFO L226 Difference]: Without dead ends: 1323 [2020-10-28 14:53:25,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2020-10-28 14:53:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1322. [2020-10-28 14:53:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2020-10-28 14:53:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1672 transitions. [2020-10-28 14:53:25,996 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1672 transitions. Word has length 24 [2020-10-28 14:53:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:25,996 INFO L481 AbstractCegarLoop]: Abstraction has 1322 states and 1672 transitions. [2020-10-28 14:53:25,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1672 transitions. [2020-10-28 14:53:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:53:25,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:25,999 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] [2020-10-28 14:53:25,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:53:25,999 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:26,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:26,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1920363425, now seen corresponding path program 1 times [2020-10-28 14:53:26,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:26,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146396364] [2020-10-28 14:53:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:26,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:26,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:53:26,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:26,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 14:53:26,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:26,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:26,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:26,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:53:26,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:53:26,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:26,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:26,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:26,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:26,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:26,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:26,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:26,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:26,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:26,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:26,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:26,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:26,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146396364] [2020-10-28 14:53:26,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:26,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:26,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817026954] [2020-10-28 14:53:26,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:26,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:26,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:26,144 INFO L87 Difference]: Start difference. First operand 1322 states and 1672 transitions. Second operand 4 states. [2020-10-28 14:53:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:26,357 INFO L93 Difference]: Finished difference Result 2157 states and 2698 transitions. [2020-10-28 14:53:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:26,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 14:53:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:26,367 INFO L225 Difference]: With dead ends: 2157 [2020-10-28 14:53:26,368 INFO L226 Difference]: Without dead ends: 2154 [2020-10-28 14:53:26,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2020-10-28 14:53:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2026. [2020-10-28 14:53:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2026 states. [2020-10-28 14:53:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 2504 transitions. [2020-10-28 14:53:26,453 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 2504 transitions. Word has length 25 [2020-10-28 14:53:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:26,453 INFO L481 AbstractCegarLoop]: Abstraction has 2026 states and 2504 transitions. [2020-10-28 14:53:26,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 2504 transitions. [2020-10-28 14:53:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:53:26,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:26,457 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] [2020-10-28 14:53:26,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:53:26,458 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1673539293, now seen corresponding path program 1 times [2020-10-28 14:53:26,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:26,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478651459] [2020-10-28 14:53:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:26,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:26,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:53:26,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:26,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 14:53:26,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:26,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:53:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:26,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:26,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:26,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:26,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:26,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:26,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:26,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:26,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:26,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478651459] [2020-10-28 14:53:26,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:26,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:26,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799880632] [2020-10-28 14:53:26,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:26,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:26,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:26,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:26,572 INFO L87 Difference]: Start difference. First operand 2026 states and 2504 transitions. Second operand 4 states. [2020-10-28 14:53:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:26,767 INFO L93 Difference]: Finished difference Result 4522 states and 5512 transitions. [2020-10-28 14:53:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:26,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 14:53:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:26,769 INFO L225 Difference]: With dead ends: 4522 [2020-10-28 14:53:26,769 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:53:26,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:53:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:53:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:53:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:53:26,778 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-10-28 14:53:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:26,778 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:53:26,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:53:26,778 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:53:26,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:53:26,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 14:53:28,930 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 575 DAG size of output: 34 [2020-10-28 14:53:28,975 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-28 14:53:28,975 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-28 14:53:28,975 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-28 14:53:28,976 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-28 14:53:28,976 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:53:28,976 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-28 14:53:28,976 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:53:28,976 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:53:28,976 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 14:53:28,976 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 14:53:28,976 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:53:28,977 INFO L274 CegarLoopResult]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,977 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 123) no Hoare annotation was computed. [2020-10-28 14:53:28,977 INFO L274 CegarLoopResult]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,977 INFO L274 CegarLoopResult]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,977 INFO L274 CegarLoopResult]: For program point L94(line 94) no Hoare annotation was computed. [2020-10-28 14:53:28,978 INFO L274 CegarLoopResult]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,978 INFO L277 CegarLoopResult]: At program point L119(lines 7 123) the Hoare annotation is: true [2020-10-28 14:53:28,978 INFO L274 CegarLoopResult]: For program point L53(lines 53 55) no Hoare annotation was computed. [2020-10-28 14:53:28,978 INFO L274 CegarLoopResult]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,978 INFO L274 CegarLoopResult]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,978 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 123) no Hoare annotation was computed. [2020-10-28 14:53:28,978 INFO L274 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-10-28 14:53:28,978 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 123) the Hoare annotation is: true [2020-10-28 14:53:28,979 INFO L274 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-10-28 14:53:28,979 INFO L274 CegarLoopResult]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,980 INFO L277 CegarLoopResult]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2020-10-28 14:53:28,980 INFO L274 CegarLoopResult]: For program point L89(line 89) no Hoare annotation was computed. [2020-10-28 14:53:28,980 INFO L274 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-10-28 14:53:28,980 INFO L270 CegarLoopResult]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2020-10-28 14:53:28,980 INFO L274 CegarLoopResult]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,980 INFO L274 CegarLoopResult]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,980 INFO L274 CegarLoopResult]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,980 INFO L274 CegarLoopResult]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,981 INFO L274 CegarLoopResult]: For program point L99(line 99) no Hoare annotation was computed. [2020-10-28 14:53:28,981 INFO L274 CegarLoopResult]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,981 INFO L274 CegarLoopResult]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2020-10-28 14:53:28,981 INFO L274 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-10-28 14:53:28,981 INFO L274 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-10-28 14:53:28,981 INFO L274 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-10-28 14:53:28,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:53:28 BoogieIcfgContainer [2020-10-28 14:53:28,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:53:28,997 INFO L168 Benchmark]: Toolchain (without parser) took 11546.43 ms. Allocated memory was 162.5 MB in the beginning and 285.2 MB in the end (delta: 122.7 MB). Free memory was 138.5 MB in the beginning and 147.8 MB in the end (delta: -9.4 MB). Peak memory consumption was 161.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:29,002 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 162.5 MB. Free memory is still 135.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:53:29,007 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.86 ms. Allocated memory is still 162.5 MB. Free memory was 137.7 MB in the beginning and 127.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:29,008 INFO L168 Benchmark]: Boogie Preprocessor took 45.77 ms. Allocated memory is still 162.5 MB. Free memory was 127.4 MB in the beginning and 125.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:29,009 INFO L168 Benchmark]: RCFGBuilder took 811.45 ms. Allocated memory is still 162.5 MB. Free memory was 125.8 MB in the beginning and 141.3 MB in the end (delta: -15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:29,009 INFO L168 Benchmark]: TraceAbstraction took 10395.25 ms. Allocated memory was 162.5 MB in the beginning and 285.2 MB in the end (delta: 122.7 MB). Free memory was 140.8 MB in the beginning and 147.8 MB in the end (delta: -7.1 MB). Peak memory consumption was 163.3 MB. Max. memory is 8.0 GB. [2020-10-28 14:53:29,017 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 162.5 MB. Free memory is still 135.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.86 ms. Allocated memory is still 162.5 MB. Free memory was 137.7 MB in the beginning and 127.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.77 ms. Allocated memory is still 162.5 MB. Free memory was 127.4 MB in the beginning and 125.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 811.45 ms. Allocated memory is still 162.5 MB. Free memory was 125.8 MB in the beginning and 141.3 MB in the end (delta: -15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10395.25 ms. Allocated memory was 162.5 MB in the beginning and 285.2 MB in the end (delta: 122.7 MB). Free memory was 140.8 MB in the beginning and 147.8 MB in the end (delta: -7.1 MB). Peak memory consumption was 163.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.1s, OverallIterations: 18, TraceHistogramMax: 1, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1136 SDtfs, 1577 SDslu, 140 SDs, 0 SdLazy, 822 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2026occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 510 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 25 PreInvPairs, 156 NumberOfFragments, 38 HoareAnnotationTreeSize, 25 FomulaSimplifications, 838578 FormulaSimplificationTreeSizeReduction, 2.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 401 NumberOfCodeBlocks, 401 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 25982 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...