/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=SHALLOWEST --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/eca-rers2012/Problem17_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:17:54,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:17:54,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:17:54,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:17:54,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:17:54,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:17:54,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:17:54,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:17:54,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:17:54,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:17:54,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:17:54,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:17:54,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:17:54,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:17:54,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:17:54,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:17:54,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:17:54,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:17:54,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:17:54,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:17:54,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:17:54,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:17:54,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:17:54,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:17:54,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:17:54,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:17:54,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:17:54,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:17:54,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:17:54,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:17:54,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:17:54,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:17:54,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:17:54,759 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 00:17:54,796 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:17:54,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:17:54,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:17:54,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:17:54,799 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:17:54,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:17:54,799 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:17:54,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:17:54,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:17:54,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:17:54,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:17:54,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:17:54,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:17:54,801 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:17:54,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:17:54,801 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:17:54,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:17:54,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:17:54,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:17:54,802 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:17:54,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:17:54,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:17:54,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:17:54,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:17:54,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:17:54,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:17:54,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:17:54,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:17:54,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:17:54,805 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:17:55,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:17:55,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:17:55,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:17:55,266 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:17:55,267 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:17:55,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label48.c [2020-10-27 00:17:55,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/296743096/e403251a64cc4f0892002496b47b2433/FLAGb0a36ea6d [2020-10-27 00:17:56,493 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:17:56,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label48.c [2020-10-27 00:17:56,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/296743096/e403251a64cc4f0892002496b47b2433/FLAGb0a36ea6d [2020-10-27 00:17:56,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/296743096/e403251a64cc4f0892002496b47b2433 [2020-10-27 00:17:56,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:17:56,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:17:56,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:17:56,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:17:56,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:17:56,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:17:56" (1/1) ... [2020-10-27 00:17:56,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f76bfbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:56, skipping insertion in model container [2020-10-27 00:17:56,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:17:56" (1/1) ... [2020-10-27 00:17:56,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:17:57,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:17:58,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:17:58,139 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:17:58,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:17:58,642 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:17:58,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58 WrapperNode [2020-10-27 00:17:58,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:17:58,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:17:58,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:17:58,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:17:58,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58" (1/1) ... [2020-10-27 00:17:58,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58" (1/1) ... [2020-10-27 00:17:58,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58" (1/1) ... [2020-10-27 00:17:58,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58" (1/1) ... [2020-10-27 00:17:58,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58" (1/1) ... [2020-10-27 00:17:58,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58" (1/1) ... [2020-10-27 00:17:58,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58" (1/1) ... [2020-10-27 00:17:59,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:17:59,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:17:59,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:17:59,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:17:59,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:17:59,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:17:59,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:17:59,102 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:17:59,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:17:59,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:17:59,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:17:59,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:17:59,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:17:59,103 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:17:59,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:17:59,103 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:17:59,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:17:59,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:17:59,104 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:17:59,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:17:59,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:17:59,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:17:59,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:17:59,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:17:59,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:17:59,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:18:08,866 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:18:08,866 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:18:08,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:18:08 BoogieIcfgContainer [2020-10-27 00:18:08,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:18:08,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:18:08,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:18:08,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:18:08,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:17:56" (1/3) ... [2020-10-27 00:18:08,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d18d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:18:08, skipping insertion in model container [2020-10-27 00:18:08,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:58" (2/3) ... [2020-10-27 00:18:08,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d18d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:18:08, skipping insertion in model container [2020-10-27 00:18:08,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:18:08" (3/3) ... [2020-10-27 00:18:08,882 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label48.c [2020-10-27 00:18:08,897 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:18:08,905 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:18:08,922 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:18:08,976 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:18:08,976 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:18:08,976 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:18:08,976 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:18:08,977 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:18:08,977 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:18:08,977 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:18:08,977 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:18:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:18:09,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 00:18:09,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:09,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:09,054 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:09,062 INFO L82 PathProgramCache]: Analyzing trace with hash -946213302, now seen corresponding path program 1 times [2020-10-27 00:18:09,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:09,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125673438] [2020-10-27 00:18:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:09,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:10,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:10,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 00:18:10,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:10,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-27 00:18:10,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:18:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 00:18:10,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:18:10,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:10,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:10,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:10,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:10,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:10,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 00:18:10,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:10,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:10,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:10,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:10,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:10,351 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 00:18:10,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125673438] [2020-10-27 00:18:10,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:18:10,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:18:10,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041520394] [2020-10-27 00:18:10,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:18:10,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:10,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:18:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:18:10,400 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:18:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:27,793 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:18:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:18:27,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-27 00:18:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:27,824 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:18:27,825 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:18:27,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 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 00:18:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:18:27,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:18:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:18:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:18:28,015 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 50 [2020-10-27 00:18:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:28,019 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:18:28,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:18:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:18:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 00:18:28,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:28,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:28,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:18:28,037 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:28,043 INFO L82 PathProgramCache]: Analyzing trace with hash 932086282, now seen corresponding path program 1 times [2020-10-27 00:18:28,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:28,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018096919] [2020-10-27 00:18:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:28,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:28,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:29,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:29,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 00:18:29,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:18:29,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1748 [2020-10-27 00:18:29,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:18:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:18:29,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:18:30,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:30,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:30,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:30,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:30,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:30,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 00:18:30,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:30,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:30,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:30,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:30,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:18:30,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:30,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:30,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:30,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:18:30,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:30,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 00:18:30,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:30,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:18:30,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:18:30,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018096919] [2020-10-27 00:18:30,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:18:30,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:18:30,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135825017] [2020-10-27 00:18:30,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:18:30,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:30,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:18:30,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:18:30,538 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:18:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:45,438 INFO L93 Difference]: Finished difference Result 2448 states and 3891 transitions. [2020-10-27 00:18:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:18:45,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-10-27 00:18:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:45,450 INFO L225 Difference]: With dead ends: 2448 [2020-10-27 00:18:45,450 INFO L226 Difference]: Without dead ends: 1462 [2020-10-27 00:18:45,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:18:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-10-27 00:18:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1433. [2020-10-27 00:18:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-27 00:18:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1859 transitions. [2020-10-27 00:18:45,518 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1859 transitions. Word has length 121 [2020-10-27 00:18:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:45,519 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 1859 transitions. [2020-10-27 00:18:45,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:18:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1859 transitions. [2020-10-27 00:18:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 00:18:45,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:45,525 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:45,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:18:45,526 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:45,527 INFO L82 PathProgramCache]: Analyzing trace with hash -603647785, now seen corresponding path program 1 times [2020-10-27 00:18:45,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:45,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700995395] [2020-10-27 00:18:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:45,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:45,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:46,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:46,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 00:18:46,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:18:46,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1362 [2020-10-27 00:18:46,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:18:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 00:18:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:47,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:47,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:47,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:47,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:47,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:18:47,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:47,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:47,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:47,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:47,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:47,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:47,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:18:47,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:47,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 00:18:47,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:18:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:18:47,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:18:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700995395] [2020-10-27 00:18:47,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:47,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:18:47,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017447175] [2020-10-27 00:18:47,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:18:47,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:18:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:18:47,538 INFO L87 Difference]: Start difference. First operand 1433 states and 1859 transitions. Second operand 8 states. [2020-10-27 00:19:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:10,157 INFO L93 Difference]: Finished difference Result 3428 states and 4730 transitions. [2020-10-27 00:19:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:19:10,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-10-27 00:19:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:10,177 INFO L225 Difference]: With dead ends: 3428 [2020-10-27 00:19:10,177 INFO L226 Difference]: Without dead ends: 1954 [2020-10-27 00:19:10,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:19:10,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2020-10-27 00:19:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1906. [2020-10-27 00:19:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1906 states. [2020-10-27 00:19:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2422 transitions. [2020-10-27 00:19:10,260 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2422 transitions. Word has length 124 [2020-10-27 00:19:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:10,260 INFO L481 AbstractCegarLoop]: Abstraction has 1906 states and 2422 transitions. [2020-10-27 00:19:10,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:19:10,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2422 transitions. [2020-10-27 00:19:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 00:19:10,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:10,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:10,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:19:10,265 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:10,266 INFO L82 PathProgramCache]: Analyzing trace with hash 817681471, now seen corresponding path program 1 times [2020-10-27 00:19:10,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:10,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820770843] [2020-10-27 00:19:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:10,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:10,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:11,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:11,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 00:19:11,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:11,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1497 [2020-10-27 00:19:11,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:11,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:19:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:19:11,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:19:12,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:12,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:12,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:12,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:12,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:12,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:19:12,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:12,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:12,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:12,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:12,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:12,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:12,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:12,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:12,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:12,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:12,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 00:19:12,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:12,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:12,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:12,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:19:12,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:12,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:12,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:12,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:12,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 00:19:12,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:12,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 00:19:12,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 00:19:12,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:19:12,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820770843] [2020-10-27 00:19:12,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:12,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:19:12,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146074468] [2020-10-27 00:19:12,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:19:12,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:12,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:19:12,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:12,499 INFO L87 Difference]: Start difference. First operand 1906 states and 2422 transitions. Second operand 7 states. [2020-10-27 00:19:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:26,747 INFO L93 Difference]: Finished difference Result 4315 states and 5860 transitions. [2020-10-27 00:19:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:19:26,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 207 [2020-10-27 00:19:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:26,765 INFO L225 Difference]: With dead ends: 4315 [2020-10-27 00:19:26,765 INFO L226 Difference]: Without dead ends: 2850 [2020-10-27 00:19:26,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:19:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2020-10-27 00:19:26,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2837. [2020-10-27 00:19:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2837 states. [2020-10-27 00:19:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 3620 transitions. [2020-10-27 00:19:26,858 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 3620 transitions. Word has length 207 [2020-10-27 00:19:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:26,859 INFO L481 AbstractCegarLoop]: Abstraction has 2837 states and 3620 transitions. [2020-10-27 00:19:26,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:19:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 3620 transitions. [2020-10-27 00:19:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-27 00:19:26,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:26,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:26,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:19:26,864 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:26,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:26,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1716225058, now seen corresponding path program 1 times [2020-10-27 00:19:26,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:26,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071545100] [2020-10-27 00:19:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:26,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:27,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:27,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:29,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:31,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:31,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-27 00:19:31,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:19:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 00:19:31,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:19:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:19:31,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:32,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:32,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:32,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:32,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:32,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:32,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:19:32,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:32,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:32,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:32,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:32,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:32,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:32,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:32,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:32,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:32,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:32,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 00:19:32,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:32,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:19:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:19:32,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:19:32,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:32,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:32,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:32,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:19:32,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:32,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 00:19:32,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:32,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:32,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:19:32,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 00:19:32,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071545100] [2020-10-27 00:19:32,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:32,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:19:32,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234023774] [2020-10-27 00:19:32,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:19:32,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:32,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:19:32,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:19:32,914 INFO L87 Difference]: Start difference. First operand 2837 states and 3620 transitions. Second operand 9 states. [2020-10-27 00:20:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:05,406 INFO L93 Difference]: Finished difference Result 9655 states and 13166 transitions. [2020-10-27 00:20:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 00:20:05,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2020-10-27 00:20:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:05,457 INFO L225 Difference]: With dead ends: 9655 [2020-10-27 00:20:05,458 INFO L226 Difference]: Without dead ends: 6756 [2020-10-27 00:20:05,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-27 00:20:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6756 states. [2020-10-27 00:20:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6756 to 6613. [2020-10-27 00:20:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6613 states. [2020-10-27 00:20:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6613 states to 6613 states and 8407 transitions. [2020-10-27 00:20:05,718 INFO L78 Accepts]: Start accepts. Automaton has 6613 states and 8407 transitions. Word has length 212 [2020-10-27 00:20:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:05,719 INFO L481 AbstractCegarLoop]: Abstraction has 6613 states and 8407 transitions. [2020-10-27 00:20:05,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:20:05,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6613 states and 8407 transitions. [2020-10-27 00:20:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-27 00:20:05,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:05,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:05,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:20:05,723 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:05,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:05,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2063524568, now seen corresponding path program 1 times [2020-10-27 00:20:05,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:05,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553752960] [2020-10-27 00:20:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:05,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:06,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:07,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:07,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-27 00:20:07,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:07,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1321 [2020-10-27 00:20:07,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:20:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:20:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-27 00:20:07,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:07,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:07,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:07,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:07,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:07,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:07,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:20:07,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:07,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:07,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:07,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:07,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:07,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:07,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:07,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:07,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:07,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 00:20:07,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:20:07,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:07,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:07,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:07,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:07,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:20:07,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:07,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 00:20:07,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:20:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 161 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:20:08,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553752960] [2020-10-27 00:20:08,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:08,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:20:08,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477308819] [2020-10-27 00:20:08,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:20:08,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:20:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:20:08,236 INFO L87 Difference]: Start difference. First operand 6613 states and 8407 transitions. Second operand 6 states. [2020-10-27 00:20:08,998 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:20:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:25,894 INFO L93 Difference]: Finished difference Result 13240 states and 17259 transitions. [2020-10-27 00:20:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:20:25,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 223 [2020-10-27 00:20:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:25,934 INFO L225 Difference]: With dead ends: 13240 [2020-10-27 00:20:25,934 INFO L226 Difference]: Without dead ends: 7068 [2020-10-27 00:20:25,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:20:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2020-10-27 00:20:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 6610. [2020-10-27 00:20:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6610 states. [2020-10-27 00:20:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6610 states to 6610 states and 8402 transitions. [2020-10-27 00:20:26,177 INFO L78 Accepts]: Start accepts. Automaton has 6610 states and 8402 transitions. Word has length 223 [2020-10-27 00:20:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:26,178 INFO L481 AbstractCegarLoop]: Abstraction has 6610 states and 8402 transitions. [2020-10-27 00:20:26,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:20:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 6610 states and 8402 transitions. [2020-10-27 00:20:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-27 00:20:26,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:26,186 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:26,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:20:26,186 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:26,187 INFO L82 PathProgramCache]: Analyzing trace with hash -872109068, now seen corresponding path program 1 times [2020-10-27 00:20:26,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:26,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321685127] [2020-10-27 00:20:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:26,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:27,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:30,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:31,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:31,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:31,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-27 00:20:31,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:20:31,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 00:20:31,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:31,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:20:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:20:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-27 00:20:31,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:31,613 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:20:31,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:31,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:31,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:31,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:31,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:20:31,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:20:31,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:31,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:31,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:31,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:31,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:31,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:31,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 00:20:31,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:31,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:20:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:20:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:32,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:32,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:32,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:32,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:20:32,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:32,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 00:20:32,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:32,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:32,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:32,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:20:32,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:32,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:20:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:32,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:32,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:32,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:20:32,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:32,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 00:20:32,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:32,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:20:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 134 proven. 153 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:20:32,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321685127] [2020-10-27 00:20:32,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:32,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:20:32,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733483099] [2020-10-27 00:20:32,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:20:32,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:20:32,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:20:32,930 INFO L87 Difference]: Start difference. First operand 6610 states and 8402 transitions. Second operand 10 states. [2020-10-27 00:20:33,157 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:20:41,857 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:20:46,440 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:21:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:10,496 INFO L93 Difference]: Finished difference Result 18435 states and 25498 transitions. [2020-10-27 00:21:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 00:21:10,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 298 [2020-10-27 00:21:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:10,569 INFO L225 Difference]: With dead ends: 18435 [2020-10-27 00:21:10,570 INFO L226 Difference]: Without dead ends: 11345 [2020-10-27 00:21:10,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-27 00:21:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11345 states. [2020-10-27 00:21:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11345 to 8440. [2020-10-27 00:21:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8440 states. [2020-10-27 00:21:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8440 states to 8440 states and 10963 transitions. [2020-10-27 00:21:11,056 INFO L78 Accepts]: Start accepts. Automaton has 8440 states and 10963 transitions. Word has length 298 [2020-10-27 00:21:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:11,057 INFO L481 AbstractCegarLoop]: Abstraction has 8440 states and 10963 transitions. [2020-10-27 00:21:11,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:21:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 8440 states and 10963 transitions. [2020-10-27 00:21:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-27 00:21:11,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:11,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:11,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:21:11,069 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1567108817, now seen corresponding path program 1 times [2020-10-27 00:21:11,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:11,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607033438] [2020-10-27 00:21:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:11,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:11,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:11,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:16,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:16,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-27 00:21:16,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:21:16,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 00:21:16,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:21:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:21:16,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:16,428 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:21:16,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:16,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:16,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:16,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:16,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:21:16,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:16,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:16,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:16,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:16,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:16,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:16,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:16,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:16,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:16,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:16,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-27 00:21:16,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:16,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:16,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:16,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:21:16,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:21:16,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:16,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:17,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:17,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 00:21:17,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:17,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-27 00:21:17,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:17,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 00:21:17,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:17,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-27 00:21:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:17,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:17,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:17,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:21:17,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:17,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 00:21:17,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:17,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:17,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:21:17,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:17,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 214 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:21:17,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607033438] [2020-10-27 00:21:17,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:17,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:21:17,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318732861] [2020-10-27 00:21:17,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:21:17,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:21:17,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:21:17,462 INFO L87 Difference]: Start difference. First operand 8440 states and 10963 transitions. Second operand 7 states. [2020-10-27 00:21:18,591 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:21:25,365 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:21:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:43,425 INFO L93 Difference]: Finished difference Result 23505 states and 31769 transitions. [2020-10-27 00:21:43,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:21:43,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 319 [2020-10-27 00:21:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:43,496 INFO L225 Difference]: With dead ends: 23505 [2020-10-27 00:21:43,496 INFO L226 Difference]: Without dead ends: 15506 [2020-10-27 00:21:43,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:21:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15506 states. [2020-10-27 00:21:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15506 to 14469. [2020-10-27 00:21:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14469 states. [2020-10-27 00:21:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14469 states to 14469 states and 18378 transitions. [2020-10-27 00:21:44,035 INFO L78 Accepts]: Start accepts. Automaton has 14469 states and 18378 transitions. Word has length 319 [2020-10-27 00:21:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:44,037 INFO L481 AbstractCegarLoop]: Abstraction has 14469 states and 18378 transitions. [2020-10-27 00:21:44,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:21:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 14469 states and 18378 transitions. [2020-10-27 00:21:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-27 00:21:44,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:44,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:44,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:21:44,047 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:44,048 INFO L82 PathProgramCache]: Analyzing trace with hash 841737365, now seen corresponding path program 1 times [2020-10-27 00:21:44,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:44,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773606336] [2020-10-27 00:21:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:44,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:44,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:44,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking...