/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:10:21,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:10:21,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:10:21,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:10:21,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:10:21,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:10:21,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:10:21,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:10:21,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:10:21,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:10:21,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:10:21,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:10:21,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:10:21,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:10:21,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:10:21,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:10:21,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:10:21,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:10:21,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:10:21,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:10:21,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:10:21,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:10:21,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:10:21,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:10:21,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:10:21,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:10:21,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:10:21,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:10:21,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:10:21,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:10:21,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:10:21,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:10:21,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:10:21,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:10:21,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:10:21,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:10:21,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:10:21,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:10:21,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:10:21,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:10:21,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:10:21,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:10:21,804 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:10:21,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:10:21,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:10:21,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:10:21,807 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:10:21,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:10:21,808 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:10:21,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:10:21,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:10:21,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:10:21,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:10:21,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:10:21,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:10:21,811 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:10:21,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:10:21,811 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:10:21,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:10:21,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:10:21,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:10:21,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:10:21,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:10:21,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:10:21,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:10:21,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:10:21,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:10:21,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:10:21,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:10:21,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:10:21,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:10:21,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:10:22,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:10:22,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:10:22,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:10:22,272 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:10:22,273 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:10:22,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-10-27 20:10:22,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56aa67a7e/e67b2a959529483eb28da9a457a72a9b/FLAG1301b2c82 [2020-10-27 20:10:23,104 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:10:23,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-10-27 20:10:23,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56aa67a7e/e67b2a959529483eb28da9a457a72a9b/FLAG1301b2c82 [2020-10-27 20:10:23,459 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56aa67a7e/e67b2a959529483eb28da9a457a72a9b [2020-10-27 20:10:23,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:10:23,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:10:23,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:10:23,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:10:23,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:10:23,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:10:23" (1/1) ... [2020-10-27 20:10:23,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71665854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23, skipping insertion in model container [2020-10-27 20:10:23,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:10:23" (1/1) ... [2020-10-27 20:10:23,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:10:23,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:10:23,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:10:23,707 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:10:23,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:10:23,751 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:10:23,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23 WrapperNode [2020-10-27 20:10:23,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:10:23,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:10:23,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:10:23,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:10:23,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23" (1/1) ... [2020-10-27 20:10:23,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23" (1/1) ... [2020-10-27 20:10:23,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23" (1/1) ... [2020-10-27 20:10:23,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23" (1/1) ... [2020-10-27 20:10:23,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23" (1/1) ... [2020-10-27 20:10:23,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23" (1/1) ... [2020-10-27 20:10:23,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23" (1/1) ... [2020-10-27 20:10:23,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:10:23,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:10:23,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:10:23,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:10:23,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:10:23,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:10:23,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:10:23,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:10:23,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:10:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:10:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:10:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:10:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:10:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:10:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:10:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:10:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:10:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:10:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:10:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:10:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:10:24,625 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:10:24,625 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:10:24,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:10:24 BoogieIcfgContainer [2020-10-27 20:10:24,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:10:24,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:10:24,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:10:24,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:10:24,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:10:23" (1/3) ... [2020-10-27 20:10:24,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a41e92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:10:24, skipping insertion in model container [2020-10-27 20:10:24,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:23" (2/3) ... [2020-10-27 20:10:24,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a41e92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:10:24, skipping insertion in model container [2020-10-27 20:10:24,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:10:24" (3/3) ... [2020-10-27 20:10:24,641 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-10-27 20:10:24,655 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:10:24,660 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:10:24,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:10:24,721 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:10:24,721 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:10:24,722 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:10:24,722 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:10:24,722 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:10:24,722 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:10:24,722 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:10:24,723 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:10:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-27 20:10:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:10:24,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:24,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:24,757 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:24,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1356734652, now seen corresponding path program 1 times [2020-10-27 20:10:24,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:24,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445825483] [2020-10-27 20:10:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:25,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:25,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:25,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:10:25,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:25,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-27 20:10:25,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:10:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:10:25,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 20:10:25,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:25,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:25,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:25,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:25,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:25,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 20:10:25,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:25,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:25,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:25,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445825483] [2020-10-27 20:10:25,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:25,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:25,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759875826] [2020-10-27 20:10:25,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:25,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:25,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:25,579 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-27 20:10:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:25,882 INFO L93 Difference]: Finished difference Result 74 states and 121 transitions. [2020-10-27 20:10:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:25,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 20:10:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:25,897 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:10:25,897 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:10:25,911 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 [2020-10-27 20:10:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:10:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-27 20:10:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:10:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 67 transitions. [2020-10-27 20:10:25,961 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 67 transitions. Word has length 19 [2020-10-27 20:10:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:25,962 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 67 transitions. [2020-10-27 20:10:25,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 67 transitions. [2020-10-27 20:10:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:10:25,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:25,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:25,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:10:25,964 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:25,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2057799230, now seen corresponding path program 1 times [2020-10-27 20:10:25,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:25,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777239301] [2020-10-27 20:10:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:25,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:26,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:26,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:10:26,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:26,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 20:10:26,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:10:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:10:26,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:26,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:26,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:26,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:26,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:26,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:10:26,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:26,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:26,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777239301] [2020-10-27 20:10:26,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:26,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:26,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112767044] [2020-10-27 20:10:26,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:26,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:26,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:26,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:26,199 INFO L87 Difference]: Start difference. First operand 40 states and 67 transitions. Second operand 4 states. [2020-10-27 20:10:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:26,356 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2020-10-27 20:10:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:26,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 20:10:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:26,359 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:10:26,359 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:10:26,360 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 [2020-10-27 20:10:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:10:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 20:10:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:10:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 91 transitions. [2020-10-27 20:10:26,373 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 91 transitions. Word has length 19 [2020-10-27 20:10:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:26,373 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 91 transitions. [2020-10-27 20:10:26,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:26,373 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 91 transitions. [2020-10-27 20:10:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:10:26,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:26,375 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] [2020-10-27 20:10:26,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:10:26,375 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash -884260222, now seen corresponding path program 1 times [2020-10-27 20:10:26,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:26,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332592085] [2020-10-27 20:10:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:26,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:26,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:26,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:10:26,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:10:26,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 20:10:26,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:10:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:26,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:10:26,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:26,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:26,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:26,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:26,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:26,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:10:26,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:26,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:26,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332592085] [2020-10-27 20:10:26,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:26,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:26,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031877927] [2020-10-27 20:10:26,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:26,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:26,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:26,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:26,653 INFO L87 Difference]: Start difference. First operand 54 states and 91 transitions. Second operand 4 states. [2020-10-27 20:10:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:26,812 INFO L93 Difference]: Finished difference Result 146 states and 256 transitions. [2020-10-27 20:10:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:26,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 20:10:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:26,815 INFO L225 Difference]: With dead ends: 146 [2020-10-27 20:10:26,815 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 20:10:26,816 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 [2020-10-27 20:10:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 20:10:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-27 20:10:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:10:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 166 transitions. [2020-10-27 20:10:26,832 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 166 transitions. Word has length 20 [2020-10-27 20:10:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:26,832 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 166 transitions. [2020-10-27 20:10:26,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 166 transitions. [2020-10-27 20:10:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:10:26,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:26,833 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] [2020-10-27 20:10:26,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:10:26,834 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:26,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:26,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1585324800, now seen corresponding path program 1 times [2020-10-27 20:10:26,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:26,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104084794] [2020-10-27 20:10:26,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:26,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:26,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:26,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:26,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:10:26,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:10:26,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 20:10:26,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:26,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:26,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:10:26,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:10:26,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:26,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:27,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:27,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:27,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:27,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:27,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:10:27,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:27,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:27,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104084794] [2020-10-27 20:10:27,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:27,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:27,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897862745] [2020-10-27 20:10:27,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:27,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:27,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:27,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:27,014 INFO L87 Difference]: Start difference. First operand 97 states and 166 transitions. Second operand 4 states. [2020-10-27 20:10:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:27,161 INFO L93 Difference]: Finished difference Result 125 states and 213 transitions. [2020-10-27 20:10:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:27,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 20:10:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:27,164 INFO L225 Difference]: With dead ends: 125 [2020-10-27 20:10:27,164 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 20:10:27,165 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 [2020-10-27 20:10:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 20:10:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-10-27 20:10:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:10:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 164 transitions. [2020-10-27 20:10:27,180 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 164 transitions. Word has length 20 [2020-10-27 20:10:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:27,180 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 164 transitions. [2020-10-27 20:10:27,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 164 transitions. [2020-10-27 20:10:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:10:27,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:27,182 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] [2020-10-27 20:10:27,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:10:27,182 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:27,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1635614009, now seen corresponding path program 1 times [2020-10-27 20:10:27,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:27,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122709414] [2020-10-27 20:10:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:27,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:27,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:27,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:27,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:10:27,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:10:27,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 20:10:27,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:27,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:10:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:10:27,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:10:27,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:27,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:27,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:27,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:27,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:10:27,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:27,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:27,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:27,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:27,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:27,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122709414] [2020-10-27 20:10:27,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:27,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:27,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19571643] [2020-10-27 20:10:27,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:27,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:27,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:27,482 INFO L87 Difference]: Start difference. First operand 97 states and 164 transitions. Second operand 4 states. [2020-10-27 20:10:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:27,637 INFO L93 Difference]: Finished difference Result 177 states and 303 transitions. [2020-10-27 20:10:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:27,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 20:10:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:27,640 INFO L225 Difference]: With dead ends: 177 [2020-10-27 20:10:27,640 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 20:10:27,642 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 [2020-10-27 20:10:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 20:10:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 133. [2020-10-27 20:10:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 20:10:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 224 transitions. [2020-10-27 20:10:27,671 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 224 transitions. Word has length 21 [2020-10-27 20:10:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:27,672 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 224 transitions. [2020-10-27 20:10:27,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 224 transitions. [2020-10-27 20:10:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:10:27,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:27,676 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] [2020-10-27 20:10:27,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:10:27,677 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash -934549431, now seen corresponding path program 1 times [2020-10-27 20:10:27,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:27,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865632753] [2020-10-27 20:10:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:27,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:27,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:27,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:27,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:10:27,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:10:27,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 20:10:27,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:27,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:27,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:10:27,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:27,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:27,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:27,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:27,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:27,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:27,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:27,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:10:27,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:27,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:27,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:27,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:27,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865632753] [2020-10-27 20:10:27,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:27,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:27,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038636059] [2020-10-27 20:10:27,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:27,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:27,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:27,913 INFO L87 Difference]: Start difference. First operand 133 states and 224 transitions. Second operand 4 states. [2020-10-27 20:10:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:28,056 INFO L93 Difference]: Finished difference Result 309 states and 527 transitions. [2020-10-27 20:10:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:28,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 20:10:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:28,058 INFO L225 Difference]: With dead ends: 309 [2020-10-27 20:10:28,058 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 20:10:28,060 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 [2020-10-27 20:10:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 20:10:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-27 20:10:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 20:10:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 300 transitions. [2020-10-27 20:10:28,083 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 300 transitions. Word has length 21 [2020-10-27 20:10:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:28,084 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 300 transitions. [2020-10-27 20:10:28,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:28,084 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 300 transitions. [2020-10-27 20:10:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:10:28,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:28,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:28,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:10:28,088 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:28,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash 842232941, now seen corresponding path program 1 times [2020-10-27 20:10:28,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:28,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999717846] [2020-10-27 20:10:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:28,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:28,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:10:28,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:10:28,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 20:10:28,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:10:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:10:28,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:28,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:28,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:28,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:28,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:28,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:10:28,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:28,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:28,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999717846] [2020-10-27 20:10:28,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:28,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:28,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206148509] [2020-10-27 20:10:28,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:28,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:28,319 INFO L87 Difference]: Start difference. First operand 181 states and 300 transitions. Second operand 4 states. [2020-10-27 20:10:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:28,466 INFO L93 Difference]: Finished difference Result 325 states and 543 transitions. [2020-10-27 20:10:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:28,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 20:10:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:28,469 INFO L225 Difference]: With dead ends: 325 [2020-10-27 20:10:28,469 INFO L226 Difference]: Without dead ends: 322 [2020-10-27 20:10:28,470 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 [2020-10-27 20:10:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-27 20:10:28,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 257. [2020-10-27 20:10:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-27 20:10:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 420 transitions. [2020-10-27 20:10:28,487 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 420 transitions. Word has length 22 [2020-10-27 20:10:28,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:28,487 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 420 transitions. [2020-10-27 20:10:28,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 420 transitions. [2020-10-27 20:10:28,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:10:28,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:28,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:28,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:10:28,490 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1543297519, now seen corresponding path program 1 times [2020-10-27 20:10:28,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:28,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144510546] [2020-10-27 20:10:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:28,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:28,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:10:28,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:10:28,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 20:10:28,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:28,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:28,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:10:28,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:28,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:28,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:28,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:28,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:28,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:28,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:10:28,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:28,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:28,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:28,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:28,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:28,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144510546] [2020-10-27 20:10:28,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:28,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:28,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48489582] [2020-10-27 20:10:28,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:28,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:28,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:28,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:28,737 INFO L87 Difference]: Start difference. First operand 257 states and 420 transitions. Second operand 4 states. [2020-10-27 20:10:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:28,885 INFO L93 Difference]: Finished difference Result 597 states and 983 transitions. [2020-10-27 20:10:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:28,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 20:10:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:28,888 INFO L225 Difference]: With dead ends: 597 [2020-10-27 20:10:28,888 INFO L226 Difference]: Without dead ends: 346 [2020-10-27 20:10:28,890 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 [2020-10-27 20:10:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-27 20:10:28,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2020-10-27 20:10:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-27 20:10:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 552 transitions. [2020-10-27 20:10:28,908 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 552 transitions. Word has length 22 [2020-10-27 20:10:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:28,908 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 552 transitions. [2020-10-27 20:10:28,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 552 transitions. [2020-10-27 20:10:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:10:28,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:28,910 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] [2020-10-27 20:10:28,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:10:28,911 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:28,911 INFO L82 PathProgramCache]: Analyzing trace with hash 346087634, now seen corresponding path program 1 times [2020-10-27 20:10:28,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:28,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890724932] [2020-10-27 20:10:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:28,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:29,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:10:29,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:10:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-27 20:10:29,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:10:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:10:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:29,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:29,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:29,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:29,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:29,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:10:29,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:29,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:29,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:29,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:29,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890724932] [2020-10-27 20:10:29,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:29,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:29,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941976722] [2020-10-27 20:10:29,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:29,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:29,298 INFO L87 Difference]: Start difference. First operand 345 states and 552 transitions. Second operand 4 states. [2020-10-27 20:10:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:29,459 INFO L93 Difference]: Finished difference Result 605 states and 971 transitions. [2020-10-27 20:10:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:29,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 20:10:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:29,463 INFO L225 Difference]: With dead ends: 605 [2020-10-27 20:10:29,463 INFO L226 Difference]: Without dead ends: 602 [2020-10-27 20:10:29,464 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 [2020-10-27 20:10:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-27 20:10:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 505. [2020-10-27 20:10:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-27 20:10:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 792 transitions. [2020-10-27 20:10:29,487 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 792 transitions. Word has length 23 [2020-10-27 20:10:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:29,488 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 792 transitions. [2020-10-27 20:10:29,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 792 transitions. [2020-10-27 20:10:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:10:29,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:29,490 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] [2020-10-27 20:10:29,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:10:29,490 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:29,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1047152212, now seen corresponding path program 1 times [2020-10-27 20:10:29,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:29,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586315114] [2020-10-27 20:10:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:29,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:29,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:10:29,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:10:29,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 20:10:29,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:10:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:29,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:29,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:29,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:29,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:29,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:29,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:29,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:10:29,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:29,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:29,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586315114] [2020-10-27 20:10:29,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:29,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:29,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230318235] [2020-10-27 20:10:29,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:29,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:29,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:29,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:29,879 INFO L87 Difference]: Start difference. First operand 505 states and 792 transitions. Second operand 4 states. [2020-10-27 20:10:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:30,032 INFO L93 Difference]: Finished difference Result 1165 states and 1835 transitions. [2020-10-27 20:10:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:30,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 20:10:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:30,037 INFO L225 Difference]: With dead ends: 1165 [2020-10-27 20:10:30,037 INFO L226 Difference]: Without dead ends: 666 [2020-10-27 20:10:30,039 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 [2020-10-27 20:10:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2020-10-27 20:10:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 665. [2020-10-27 20:10:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-10-27 20:10:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1016 transitions. [2020-10-27 20:10:30,088 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1016 transitions. Word has length 23 [2020-10-27 20:10:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:30,088 INFO L481 AbstractCegarLoop]: Abstraction has 665 states and 1016 transitions. [2020-10-27 20:10:30,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1016 transitions. [2020-10-27 20:10:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:10:30,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:30,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:30,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:10:30,091 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:30,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2145462872, now seen corresponding path program 1 times [2020-10-27 20:10:30,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:30,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072675407] [2020-10-27 20:10:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:30,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:30,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:10:30,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:10:30,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-27 20:10:30,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:10:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:10:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:30,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:30,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:30,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:30,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:30,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:10:30,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:30,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:30,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:30,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:30,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:30,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072675407] [2020-10-27 20:10:30,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:30,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:30,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075342135] [2020-10-27 20:10:30,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:30,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:30,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:30,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:30,683 INFO L87 Difference]: Start difference. First operand 665 states and 1016 transitions. Second operand 4 states. [2020-10-27 20:10:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:30,840 INFO L93 Difference]: Finished difference Result 1133 states and 1723 transitions. [2020-10-27 20:10:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:30,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 20:10:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:30,846 INFO L225 Difference]: With dead ends: 1133 [2020-10-27 20:10:30,847 INFO L226 Difference]: Without dead ends: 1130 [2020-10-27 20:10:30,848 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 [2020-10-27 20:10:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2020-10-27 20:10:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1001. [2020-10-27 20:10:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-10-27 20:10:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1496 transitions. [2020-10-27 20:10:30,888 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1496 transitions. Word has length 24 [2020-10-27 20:10:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:30,889 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1496 transitions. [2020-10-27 20:10:30,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1496 transitions. [2020-10-27 20:10:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:10:30,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:30,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:30,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:10:30,892 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1448439846, now seen corresponding path program 1 times [2020-10-27 20:10:30,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:30,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397495669] [2020-10-27 20:10:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:30,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:30,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:31,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:31,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:10:31,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:10:31,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-27 20:10:31,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:10:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:31,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:31,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:31,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:31,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:31,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:31,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:31,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:10:31,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:31,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:31,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397495669] [2020-10-27 20:10:31,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:31,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:31,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994453811] [2020-10-27 20:10:31,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:31,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:31,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:31,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:31,421 INFO L87 Difference]: Start difference. First operand 1001 states and 1496 transitions. Second operand 4 states. [2020-10-27 20:10:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:31,598 INFO L93 Difference]: Finished difference Result 2285 states and 3419 transitions. [2020-10-27 20:10:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:31,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 20:10:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:31,606 INFO L225 Difference]: With dead ends: 2285 [2020-10-27 20:10:31,606 INFO L226 Difference]: Without dead ends: 1290 [2020-10-27 20:10:31,609 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 [2020-10-27 20:10:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2020-10-27 20:10:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1289. [2020-10-27 20:10:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1289 states. [2020-10-27 20:10:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1864 transitions. [2020-10-27 20:10:31,694 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1864 transitions. Word has length 24 [2020-10-27 20:10:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:31,695 INFO L481 AbstractCegarLoop]: Abstraction has 1289 states and 1864 transitions. [2020-10-27 20:10:31,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1864 transitions. [2020-10-27 20:10:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:10:31,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:31,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:31,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:10:31,698 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2091530973, now seen corresponding path program 1 times [2020-10-27 20:10:31,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:31,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573477625] [2020-10-27 20:10:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:31,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:31,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:31,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:31,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:31,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:32,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:32,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:10:32,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:10:32,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 992 [2020-10-27 20:10:32,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:32,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:32,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:10:32,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:10:32,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:32,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:32,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:32,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:32,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:32,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:10:32,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:32,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:32,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573477625] [2020-10-27 20:10:32,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:32,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:32,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685359589] [2020-10-27 20:10:32,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:32,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:32,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:32,772 INFO L87 Difference]: Start difference. First operand 1289 states and 1864 transitions. Second operand 4 states. [2020-10-27 20:10:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:33,067 INFO L93 Difference]: Finished difference Result 2124 states and 3018 transitions. [2020-10-27 20:10:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:33,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:10:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:33,085 INFO L225 Difference]: With dead ends: 2124 [2020-10-27 20:10:33,085 INFO L226 Difference]: Without dead ends: 2121 [2020-10-27 20:10:33,087 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 [2020-10-27 20:10:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2020-10-27 20:10:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1993. [2020-10-27 20:10:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1993 states. [2020-10-27 20:10:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2824 transitions. [2020-10-27 20:10:33,211 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2824 transitions. Word has length 25 [2020-10-27 20:10:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:33,211 INFO L481 AbstractCegarLoop]: Abstraction has 1993 states and 2824 transitions. [2020-10-27 20:10:33,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2824 transitions. [2020-10-27 20:10:33,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:10:33,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:33,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:33,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:10:33,216 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1502371745, now seen corresponding path program 1 times [2020-10-27 20:10:33,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:33,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589420382] [2020-10-27 20:10:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:33,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:33,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:33,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:33,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:33,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:33,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:34,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:34,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:10:34,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:10:34,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-27 20:10:34,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:10:34,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:10:34,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:10:34,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:34,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:34,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:34,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:34,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:34,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:10:34,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:34,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:10:34,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589420382] [2020-10-27 20:10:34,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:34,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:34,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136637338] [2020-10-27 20:10:34,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:34,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:34,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:34,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:34,385 INFO L87 Difference]: Start difference. First operand 1993 states and 2824 transitions. Second operand 4 states. [2020-10-27 20:10:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:34,612 INFO L93 Difference]: Finished difference Result 4489 states and 6344 transitions. [2020-10-27 20:10:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:34,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:10:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:34,614 INFO L225 Difference]: With dead ends: 4489 [2020-10-27 20:10:34,614 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:10:34,625 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 [2020-10-27 20:10:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:10:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:10:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:10:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:10:34,626 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-10-27 20:10:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:34,626 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:10:34,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:10:34,626 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:10:34,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:10:34,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 20:10:36,710 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 570 DAG size of output: 34 [2020-10-27 20:10:36,770 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 20:10:36,771 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 20:10:36,771 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 20:10:36,771 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 20:10:36,771 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:10:36,772 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|)) [2020-10-27 20:10:36,772 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:10:36,772 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:10:36,772 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 20:10:36,772 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 20:10:36,772 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:10:36,772 INFO L274 CegarLoopResult]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,773 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 123) no Hoare annotation was computed. [2020-10-27 20:10:36,773 INFO L274 CegarLoopResult]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,773 INFO L274 CegarLoopResult]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,773 INFO L274 CegarLoopResult]: For program point L94(line 94) no Hoare annotation was computed. [2020-10-27 20:10:36,773 INFO L274 CegarLoopResult]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,773 INFO L277 CegarLoopResult]: At program point L119(lines 7 123) the Hoare annotation is: true [2020-10-27 20:10:36,773 INFO L274 CegarLoopResult]: For program point L53(lines 53 55) no Hoare annotation was computed. [2020-10-27 20:10:36,773 INFO L274 CegarLoopResult]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,774 INFO L274 CegarLoopResult]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,774 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 123) no Hoare annotation was computed. [2020-10-27 20:10:36,774 INFO L274 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-10-27 20:10:36,774 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 123) the Hoare annotation is: true [2020-10-27 20:10:36,774 INFO L274 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-10-27 20:10:36,774 INFO L274 CegarLoopResult]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,774 INFO L277 CegarLoopResult]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2020-10-27 20:10:36,774 INFO L274 CegarLoopResult]: For program point L89(line 89) no Hoare annotation was computed. [2020-10-27 20:10:36,775 INFO L274 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-10-27 20:10:36,775 INFO L270 CegarLoopResult]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2020-10-27 20:10:36,775 INFO L274 CegarLoopResult]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,775 INFO L274 CegarLoopResult]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,775 INFO L274 CegarLoopResult]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,775 INFO L274 CegarLoopResult]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,775 INFO L274 CegarLoopResult]: For program point L99(line 99) no Hoare annotation was computed. [2020-10-27 20:10:36,775 INFO L274 CegarLoopResult]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,776 INFO L274 CegarLoopResult]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2020-10-27 20:10:36,776 INFO L274 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-10-27 20:10:36,776 INFO L274 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-10-27 20:10:36,776 INFO L274 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-10-27 20:10:36,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:10:36 BoogieIcfgContainer [2020-10-27 20:10:36,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:10:36,790 INFO L168 Benchmark]: Toolchain (without parser) took 13325.65 ms. Allocated memory was 125.8 MB in the beginning and 341.8 MB in the end (delta: 216.0 MB). Free memory was 101.7 MB in the beginning and 226.3 MB in the end (delta: -124.6 MB). Peak memory consumption was 197.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:36,791 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:10:36,791 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.15 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 91.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:36,792 INFO L168 Benchmark]: Boogie Preprocessor took 43.68 ms. Allocated memory is still 125.8 MB. Free memory was 91.2 MB in the beginning and 89.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:36,793 INFO L168 Benchmark]: RCFGBuilder took 831.27 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 89.6 MB in the beginning and 134.4 MB in the end (delta: -44.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:36,794 INFO L168 Benchmark]: TraceAbstraction took 12156.29 ms. Allocated memory was 153.1 MB in the beginning and 341.8 MB in the end (delta: 188.7 MB). Free memory was 133.9 MB in the beginning and 226.3 MB in the end (delta: -92.4 MB). Peak memory consumption was 201.7 MB. Max. memory is 8.0 GB. [2020-10-27 20:10:36,797 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.15 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 91.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.68 ms. Allocated memory is still 125.8 MB. Free memory was 91.2 MB in the beginning and 89.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 831.27 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 89.6 MB in the beginning and 134.4 MB in the end (delta: -44.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12156.29 ms. Allocated memory was 153.1 MB in the beginning and 341.8 MB in the end (delta: 188.7 MB). Free memory was 133.9 MB in the beginning and 226.3 MB in the end (delta: -92.4 MB). Peak memory consumption was 201.7 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: 9.9s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 867 SDtfs, 1230 SDslu, 108 SDs, 0 SdLazy, 647 SolverSat, 53 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1993occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 14 MinimizatonAttempts, 506 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 21 PreInvPairs, 151 NumberOfFragments, 38 HoareAnnotationTreeSize, 21 FomulaSimplifications, 833989 FormulaSimplificationTreeSizeReduction, 2.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 308 NumberOfCodeBlocks, 308 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 19460 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...