/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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:37:40,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:37:40,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:37:40,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:37:40,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:37:40,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:37:40,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:37:40,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:37:40,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:37:40,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:37:40,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:37:40,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:37:40,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:37:40,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:37:40,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:37:40,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:37:40,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:37:40,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:37:40,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:37:40,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:37:40,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:37:40,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:37:40,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:37:40,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:37:40,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:37:40,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:37:40,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:37:40,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:37:40,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:37:40,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:37:40,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:37:40,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:37:40,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:37:40,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:37:40,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:37:40,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:37:40,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:37:40,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:37:40,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:37:40,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:37:40,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:37:40,844 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 05:37:40,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:37:40,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:37:40,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:37:40,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:37:40,898 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:37:40,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:37:40,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:37:40,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:37:40,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:37:40,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:37:40,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:37:40,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:37:40,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:37:40,901 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:37:40,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:37:40,901 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:37:40,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:37:40,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:37:40,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:37:40,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:37:40,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:37:40,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:37:40,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:37:40,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:37:40,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:37:40,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:37:40,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:37:40,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:37:40,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:37:40,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:37:41,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:37:41,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:37:41,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:37:41,346 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:37:41,347 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:37:41,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:37:41,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf82ef3d5/f350a75e4d784740b30f9e739eab3d1a/FLAGdc4a9197d [2020-10-27 05:37:42,031 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:37:42,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:37:42,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf82ef3d5/f350a75e4d784740b30f9e739eab3d1a/FLAGdc4a9197d [2020-10-27 05:37:42,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf82ef3d5/f350a75e4d784740b30f9e739eab3d1a [2020-10-27 05:37:42,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:37:42,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:37:42,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:37:42,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:37:42,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:37:42,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:37:42" (1/1) ... [2020-10-27 05:37:42,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771fe285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42, skipping insertion in model container [2020-10-27 05:37:42,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:37:42" (1/1) ... [2020-10-27 05:37:42,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:37:42,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:37:42,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:37:42,736 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:37:42,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:37:42,915 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:37:42,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42 WrapperNode [2020-10-27 05:37:42,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:37:42,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:37:42,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:37:42,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:37:42,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42" (1/1) ... [2020-10-27 05:37:42,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42" (1/1) ... [2020-10-27 05:37:42,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42" (1/1) ... [2020-10-27 05:37:42,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42" (1/1) ... [2020-10-27 05:37:42,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42" (1/1) ... [2020-10-27 05:37:42,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42" (1/1) ... [2020-10-27 05:37:42,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42" (1/1) ... [2020-10-27 05:37:42,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:37:42,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:37:42,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:37:42,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:37:42,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42" (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 05:37:43,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:37:43,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:37:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:37:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:37:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:37:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:37:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:37:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:37:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:37:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:37:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:37:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:37:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:37:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:37:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:37:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:37:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:37:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:37:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:37:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:37:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:37:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:37:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:37:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:37:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:37:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:37:43,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:37:44,033 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:37:44,033 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:37:44,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:37:44 BoogieIcfgContainer [2020-10-27 05:37:44,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:37:44,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:37:44,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:37:44,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:37:44,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:37:42" (1/3) ... [2020-10-27 05:37:44,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1bbbfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:37:44, skipping insertion in model container [2020-10-27 05:37:44,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:37:42" (2/3) ... [2020-10-27 05:37:44,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1bbbfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:37:44, skipping insertion in model container [2020-10-27 05:37:44,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:37:44" (3/3) ... [2020-10-27 05:37:44,046 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:37:44,059 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:37:44,065 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:37:44,079 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:37:44,108 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:37:44,108 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:37:44,108 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:37:44,108 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:37:44,108 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:37:44,109 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:37:44,109 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:37:44,109 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:37:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states. [2020-10-27 05:37:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:37:44,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:44,142 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, 1, 1, 1, 1, 1] [2020-10-27 05:37:44,143 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:44,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1411810681, now seen corresponding path program 1 times [2020-10-27 05:37:44,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:44,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123468970] [2020-10-27 05:37:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:44,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:44,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:46,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:46,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:37:46,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:37:46,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2060 [2020-10-27 05:37:46,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:46,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:37:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:37:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 05:37:46,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:37:46,903 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:46,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:46,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:46,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:46,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:46,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:46,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:37:46,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:37:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:37:46,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:46,968 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 05:37:46,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123468970] [2020-10-27 05:37:46,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:46,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:37:46,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442457357] [2020-10-27 05:37:46,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:37:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:46,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:37:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:37:46,995 INFO L87 Difference]: Start difference. First operand 171 states. Second operand 6 states. [2020-10-27 05:37:47,822 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:37:48,019 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:37:48,237 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:37:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:48,765 INFO L93 Difference]: Finished difference Result 494 states and 805 transitions. [2020-10-27 05:37:48,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:37:48,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 05:37:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:48,784 INFO L225 Difference]: With dead ends: 494 [2020-10-27 05:37:48,784 INFO L226 Difference]: Without dead ends: 357 [2020-10-27 05:37:48,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:37:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-27 05:37:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 351. [2020-10-27 05:37:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-27 05:37:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 518 transitions. [2020-10-27 05:37:48,889 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 518 transitions. Word has length 55 [2020-10-27 05:37:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:48,889 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 518 transitions. [2020-10-27 05:37:48,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 518 transitions. [2020-10-27 05:37:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:37:48,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:48,899 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, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:48,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:37:48,899 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:48,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1442003209, now seen corresponding path program 1 times [2020-10-27 05:37:48,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:48,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734064269] [2020-10-27 05:37:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:48,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:49,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:49,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:50,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:50,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:37:50,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:37:50,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1402 [2020-10-27 05:37:50,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:50,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:37:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 05:37:50,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:37:50,654 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:50,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:50,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:50,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:50,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:50,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:37:50,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:50,720 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 05:37:50,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734064269] [2020-10-27 05:37:50,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:50,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:37:50,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056024328] [2020-10-27 05:37:50,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:37:50,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:50,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:37:50,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:37:50,724 INFO L87 Difference]: Start difference. First operand 351 states and 518 transitions. Second operand 6 states. [2020-10-27 05:37:50,933 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:37:51,508 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:37:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:52,043 INFO L93 Difference]: Finished difference Result 851 states and 1284 transitions. [2020-10-27 05:37:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:37:52,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:37:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:52,054 INFO L225 Difference]: With dead ends: 851 [2020-10-27 05:37:52,055 INFO L226 Difference]: Without dead ends: 568 [2020-10-27 05:37:52,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:37:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-27 05:37:52,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 565. [2020-10-27 05:37:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-10-27 05:37:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 844 transitions. [2020-10-27 05:37:52,168 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 844 transitions. Word has length 56 [2020-10-27 05:37:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:52,169 INFO L481 AbstractCegarLoop]: Abstraction has 565 states and 844 transitions. [2020-10-27 05:37:52,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 844 transitions. [2020-10-27 05:37:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:37:52,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:52,181 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, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:52,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:37:52,182 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash 240607992, now seen corresponding path program 1 times [2020-10-27 05:37:52,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:52,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862908265] [2020-10-27 05:37:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:52,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:52,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:52,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:53,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:53,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:37:53,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:37:53,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-27 05:37:53,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:53,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:37:53,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:53,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:37:53,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:53,834 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:53,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:53,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:53,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:53,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:53,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:53,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:37:53,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:53,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:53,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:53,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:53,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:53,897 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 05:37:53,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862908265] [2020-10-27 05:37:53,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:53,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:37:53,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325423219] [2020-10-27 05:37:53,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:37:53,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:37:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:37:53,902 INFO L87 Difference]: Start difference. First operand 565 states and 844 transitions. Second operand 6 states. [2020-10-27 05:37:54,083 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:37:54,614 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:37:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:55,100 INFO L93 Difference]: Finished difference Result 1522 states and 2303 transitions. [2020-10-27 05:37:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:37:55,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:37:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:55,107 INFO L225 Difference]: With dead ends: 1522 [2020-10-27 05:37:55,107 INFO L226 Difference]: Without dead ends: 1005 [2020-10-27 05:37:55,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:37:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2020-10-27 05:37:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1002. [2020-10-27 05:37:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-10-27 05:37:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1505 transitions. [2020-10-27 05:37:55,201 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1505 transitions. Word has length 56 [2020-10-27 05:37:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:55,202 INFO L481 AbstractCegarLoop]: Abstraction has 1002 states and 1505 transitions. [2020-10-27 05:37:55,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1505 transitions. [2020-10-27 05:37:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:37:55,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:55,203 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, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:55,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:37:55,204 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1841252121, now seen corresponding path program 1 times [2020-10-27 05:37:55,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:55,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933867637] [2020-10-27 05:37:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:55,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:55,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:55,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:56,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:56,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:37:56,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:37:56,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1335 [2020-10-27 05:37:56,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:56,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:37:56,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:37:56,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:56,798 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:37:56,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:56,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:56,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:56,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:56,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:37:56,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:56,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:56,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:56,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:56,859 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 05:37:56,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933867637] [2020-10-27 05:37:56,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:56,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:37:56,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310888799] [2020-10-27 05:37:56,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:37:56,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:37:56,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:37:56,862 INFO L87 Difference]: Start difference. First operand 1002 states and 1505 transitions. Second operand 6 states. [2020-10-27 05:37:57,047 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:37:57,518 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:37:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:57,993 INFO L93 Difference]: Finished difference Result 2833 states and 4274 transitions. [2020-10-27 05:37:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:37:57,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:37:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:58,008 INFO L225 Difference]: With dead ends: 2833 [2020-10-27 05:37:58,009 INFO L226 Difference]: Without dead ends: 1863 [2020-10-27 05:37:58,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:37:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2020-10-27 05:37:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1860. [2020-10-27 05:37:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-10-27 05:37:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2761 transitions. [2020-10-27 05:37:58,179 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2761 transitions. Word has length 56 [2020-10-27 05:37:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:58,180 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2761 transitions. [2020-10-27 05:37:58,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2761 transitions. [2020-10-27 05:37:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:37:58,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:58,184 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:58,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:37:58,185 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1497188338, now seen corresponding path program 1 times [2020-10-27 05:37:58,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:58,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363751171] [2020-10-27 05:37:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:58,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:58,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:58,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:58,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:01,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:01,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:38:01,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:38:01,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2872 [2020-10-27 05:38:01,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:01,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:38:01,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:01,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:38:01,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:01,414 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:01,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:01,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:01,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:01,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:01,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:01,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:38:01,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:01,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:01,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:01,478 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 05:38:01,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363751171] [2020-10-27 05:38:01,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:01,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:01,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714730432] [2020-10-27 05:38:01,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:38:01,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:38:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:01,493 INFO L87 Difference]: Start difference. First operand 1860 states and 2761 transitions. Second operand 11 states. [2020-10-27 05:38:01,729 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:38:02,681 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:38:02,890 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:38:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:04,699 INFO L93 Difference]: Finished difference Result 6006 states and 8932 transitions. [2020-10-27 05:38:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:38:04,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:38:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:04,729 INFO L225 Difference]: With dead ends: 6006 [2020-10-27 05:38:04,729 INFO L226 Difference]: Without dead ends: 5449 [2020-10-27 05:38:04,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:38:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2020-10-27 05:38:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 1860. [2020-10-27 05:38:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-10-27 05:38:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2760 transitions. [2020-10-27 05:38:04,971 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2760 transitions. Word has length 57 [2020-10-27 05:38:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:04,973 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2760 transitions. [2020-10-27 05:38:04,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:38:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2760 transitions. [2020-10-27 05:38:04,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:38:04,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:04,975 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:04,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:38:04,975 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:04,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1205467218, now seen corresponding path program 1 times [2020-10-27 05:38:04,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:04,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291397134] [2020-10-27 05:38:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:05,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:05,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:05,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:07,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:07,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:38:07,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:38:07,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2842 [2020-10-27 05:38:07,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:07,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:38:07,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:07,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:38:07,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:38:08,140 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:08,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:08,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:08,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:08,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:08,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:08,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:38:08,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:08,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:08,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:08,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:08,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:08,199 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 05:38:08,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291397134] [2020-10-27 05:38:08,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:08,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:08,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304194964] [2020-10-27 05:38:08,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:38:08,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:08,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:38:08,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:08,202 INFO L87 Difference]: Start difference. First operand 1860 states and 2760 transitions. Second operand 11 states. [2020-10-27 05:38:08,482 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:38:09,466 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:38:09,644 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:38:11,576 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:38:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:12,118 INFO L93 Difference]: Finished difference Result 10112 states and 15202 transitions. [2020-10-27 05:38:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:38:12,118 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:38:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:12,164 INFO L225 Difference]: With dead ends: 10112 [2020-10-27 05:38:12,165 INFO L226 Difference]: Without dead ends: 9105 [2020-10-27 05:38:12,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:38:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2020-10-27 05:38:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 1917. [2020-10-27 05:38:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-10-27 05:38:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2834 transitions. [2020-10-27 05:38:12,461 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2834 transitions. Word has length 57 [2020-10-27 05:38:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:12,461 INFO L481 AbstractCegarLoop]: Abstraction has 1917 states and 2834 transitions. [2020-10-27 05:38:12,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:38:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2834 transitions. [2020-10-27 05:38:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:38:12,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:12,463 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:12,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:38:12,464 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:12,464 INFO L82 PathProgramCache]: Analyzing trace with hash 287238322, now seen corresponding path program 1 times [2020-10-27 05:38:12,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:12,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641649611] [2020-10-27 05:38:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:12,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:12,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:12,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:12,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:14,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:14,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:38:14,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:38:14,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2342 [2020-10-27 05:38:14,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:14,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:38:14,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:14,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:38:14,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:15,118 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:15,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:15,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:15,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:15,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:15,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:15,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:38:15,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:15,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:15,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:15,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:15,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:15,187 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 05:38:15,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641649611] [2020-10-27 05:38:15,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:15,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:15,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060528827] [2020-10-27 05:38:15,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:38:15,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:15,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:38:15,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:15,189 INFO L87 Difference]: Start difference. First operand 1917 states and 2834 transitions. Second operand 11 states. [2020-10-27 05:38:15,411 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:38:16,670 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:38:16,885 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:38:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:19,458 INFO L93 Difference]: Finished difference Result 7271 states and 10728 transitions. [2020-10-27 05:38:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:38:19,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:38:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:19,487 INFO L225 Difference]: With dead ends: 7271 [2020-10-27 05:38:19,487 INFO L226 Difference]: Without dead ends: 5822 [2020-10-27 05:38:19,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:38:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2020-10-27 05:38:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 1903. [2020-10-27 05:38:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1903 states. [2020-10-27 05:38:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2793 transitions. [2020-10-27 05:38:19,818 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2793 transitions. Word has length 57 [2020-10-27 05:38:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:19,818 INFO L481 AbstractCegarLoop]: Abstraction has 1903 states and 2793 transitions. [2020-10-27 05:38:19,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:38:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2793 transitions. [2020-10-27 05:38:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:38:19,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:19,820 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:19,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:38:19,820 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:19,821 INFO L82 PathProgramCache]: Analyzing trace with hash 58071964, now seen corresponding path program 1 times [2020-10-27 05:38:19,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:19,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142587642] [2020-10-27 05:38:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:19,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:20,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:20,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:38:20,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:38:20,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 05:38:20,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:38:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:38:20,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:20,327 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:20,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:20,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:20,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:20,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:20,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:20,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:38:20,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:20,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:20,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:20,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:20,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:20,362 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 05:38:20,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142587642] [2020-10-27 05:38:20,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:20,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:38:20,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990238426] [2020-10-27 05:38:20,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:20,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:20,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:20,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:20,365 INFO L87 Difference]: Start difference. First operand 1903 states and 2793 transitions. Second operand 6 states. [2020-10-27 05:38:20,543 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:38:21,061 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:38:21,261 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:38:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:22,222 INFO L93 Difference]: Finished difference Result 6136 states and 9131 transitions. [2020-10-27 05:38:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:38:22,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-27 05:38:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:22,247 INFO L225 Difference]: With dead ends: 6136 [2020-10-27 05:38:22,248 INFO L226 Difference]: Without dead ends: 4957 [2020-10-27 05:38:22,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2020-10-27 05:38:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 3499. [2020-10-27 05:38:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3499 states. [2020-10-27 05:38:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 5107 transitions. [2020-10-27 05:38:22,739 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 5107 transitions. Word has length 58 [2020-10-27 05:38:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:22,739 INFO L481 AbstractCegarLoop]: Abstraction has 3499 states and 5107 transitions. [2020-10-27 05:38:22,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 5107 transitions. [2020-10-27 05:38:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:38:22,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:22,742 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:22,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:38:22,743 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:22,743 INFO L82 PathProgramCache]: Analyzing trace with hash -83043175, now seen corresponding path program 1 times [2020-10-27 05:38:22,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:22,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733700181] [2020-10-27 05:38:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:22,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:22,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:22,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:25,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:25,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:38:25,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:25,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2496 [2020-10-27 05:38:25,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:25,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:38:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:38:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:38:25,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:25,561 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-27 05:38:25,833 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:25,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:25,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:25,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:25,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:25,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:25,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:38:25,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:25,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:38:25,889 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 05:38:25,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733700181] [2020-10-27 05:38:25,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:25,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:25,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078729604] [2020-10-27 05:38:25,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:38:25,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:25,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:38:25,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:38:25,893 INFO L87 Difference]: Start difference. First operand 3499 states and 5107 transitions. Second operand 10 states. [2020-10-27 05:38:26,090 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:38:27,074 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:38:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:29,157 INFO L93 Difference]: Finished difference Result 13765 states and 20297 transitions. [2020-10-27 05:38:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:38:29,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:38:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:29,202 INFO L225 Difference]: With dead ends: 13765 [2020-10-27 05:38:29,202 INFO L226 Difference]: Without dead ends: 10447 [2020-10-27 05:38:29,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:38:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10447 states. [2020-10-27 05:38:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10447 to 4137. [2020-10-27 05:38:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4137 states. [2020-10-27 05:38:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4137 states to 4137 states and 6057 transitions. [2020-10-27 05:38:29,861 INFO L78 Accepts]: Start accepts. Automaton has 4137 states and 6057 transitions. Word has length 60 [2020-10-27 05:38:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:29,861 INFO L481 AbstractCegarLoop]: Abstraction has 4137 states and 6057 transitions. [2020-10-27 05:38:29,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:38:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4137 states and 6057 transitions. [2020-10-27 05:38:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:38:29,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:29,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:29,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:38:29,864 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1750287481, now seen corresponding path program 1 times [2020-10-27 05:38:29,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:29,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783439761] [2020-10-27 05:38:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:29,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:29,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:30,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:31,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:31,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:38:31,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:31,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1887 [2020-10-27 05:38:31,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:31,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:38:31,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:38:31,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:38:31,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:32,181 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:32,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:32,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:32,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:32,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:32,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:32,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:38:32,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:32,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:32,224 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 05:38:32,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783439761] [2020-10-27 05:38:32,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:32,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:32,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333126278] [2020-10-27 05:38:32,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:38:32,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:38:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:38:32,226 INFO L87 Difference]: Start difference. First operand 4137 states and 6057 transitions. Second operand 10 states. [2020-10-27 05:38:32,453 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:38:33,637 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:38:33,889 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:38:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:37,071 INFO L93 Difference]: Finished difference Result 20260 states and 30046 transitions. [2020-10-27 05:38:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:38:37,072 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:38:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:37,113 INFO L225 Difference]: With dead ends: 20260 [2020-10-27 05:38:37,114 INFO L226 Difference]: Without dead ends: 16313 [2020-10-27 05:38:37,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:38:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16313 states. [2020-10-27 05:38:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16313 to 8476. [2020-10-27 05:38:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8476 states. [2020-10-27 05:38:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8476 states to 8476 states and 12572 transitions. [2020-10-27 05:38:38,487 INFO L78 Accepts]: Start accepts. Automaton has 8476 states and 12572 transitions. Word has length 60 [2020-10-27 05:38:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:38,487 INFO L481 AbstractCegarLoop]: Abstraction has 8476 states and 12572 transitions. [2020-10-27 05:38:38,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:38:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8476 states and 12572 transitions. [2020-10-27 05:38:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:38:38,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:38,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:38:38,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:38:38,490 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1342721893, now seen corresponding path program 1 times [2020-10-27 05:38:38,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:38,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084039368] [2020-10-27 05:38:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:38,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:38,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:38,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:40,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:40,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:38:40,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:40,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2308 [2020-10-27 05:38:40,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:38:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:38:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:38:40,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:41,234 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:41,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:41,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:41,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:41,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:41,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:41,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:38:41,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:41,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:41,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:41,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:41,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:41,278 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 05:38:41,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084039368] [2020-10-27 05:38:41,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:41,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:41,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185259112] [2020-10-27 05:38:41,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:38:41,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:41,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:38:41,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:38:41,284 INFO L87 Difference]: Start difference. First operand 8476 states and 12572 transitions. Second operand 10 states. [2020-10-27 05:38:41,552 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 05:38:42,900 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:38:43,172 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:38:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:49,538 INFO L93 Difference]: Finished difference Result 30928 states and 45921 transitions. [2020-10-27 05:38:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:38:49,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 05:38:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:49,599 INFO L225 Difference]: With dead ends: 30928 [2020-10-27 05:38:49,599 INFO L226 Difference]: Without dead ends: 28801 [2020-10-27 05:38:49,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:38:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28801 states. [2020-10-27 05:38:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28801 to 8474. [2020-10-27 05:38:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8474 states. [2020-10-27 05:38:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8474 states to 8474 states and 12569 transitions. [2020-10-27 05:38:51,506 INFO L78 Accepts]: Start accepts. Automaton has 8474 states and 12569 transitions. Word has length 60 [2020-10-27 05:38:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:51,506 INFO L481 AbstractCegarLoop]: Abstraction has 8474 states and 12569 transitions. [2020-10-27 05:38:51,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:38:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 8474 states and 12569 transitions. [2020-10-27 05:38:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:38:51,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:51,508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:51,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:38:51,508 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 560307569, now seen corresponding path program 1 times [2020-10-27 05:38:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:51,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097858760] [2020-10-27 05:38:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:51,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:54,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:54,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:38:54,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:38:54,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2837 [2020-10-27 05:38:54,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:54,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:38:54,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:54,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:38:54,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:38:54,726 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:54,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:54,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:54,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:54,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:54,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:54,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:38:54,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:54,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:54,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:54,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:54,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:54,789 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 05:38:54,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097858760] [2020-10-27 05:38:54,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:54,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:38:54,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826289263] [2020-10-27 05:38:54,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:38:54,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:38:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:38:54,792 INFO L87 Difference]: Start difference. First operand 8474 states and 12569 transitions. Second operand 8 states. [2020-10-27 05:38:55,015 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:38:55,753 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:38:57,835 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:39:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:02,435 INFO L93 Difference]: Finished difference Result 39712 states and 58453 transitions. [2020-10-27 05:39:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:39:02,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-27 05:39:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:02,480 INFO L225 Difference]: With dead ends: 39712 [2020-10-27 05:39:02,481 INFO L226 Difference]: Without dead ends: 31714 [2020-10-27 05:39:02,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:39:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31714 states. [2020-10-27 05:39:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31714 to 8379. [2020-10-27 05:39:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8379 states. [2020-10-27 05:39:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8379 states to 8379 states and 12318 transitions. [2020-10-27 05:39:04,219 INFO L78 Accepts]: Start accepts. Automaton has 8379 states and 12318 transitions. Word has length 61 [2020-10-27 05:39:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:04,219 INFO L481 AbstractCegarLoop]: Abstraction has 8379 states and 12318 transitions. [2020-10-27 05:39:04,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:39:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 8379 states and 12318 transitions. [2020-10-27 05:39:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:39:04,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:04,221 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:04,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:39:04,222 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash -951982865, now seen corresponding path program 1 times [2020-10-27 05:39:04,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:04,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061843438] [2020-10-27 05:39:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:04,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:05,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:07,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:07,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:39:07,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:39:07,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-27 05:39:07,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:39:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:39:07,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:07,500 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:39:07,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:07,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:07,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:07,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:07,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:07,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:39:07,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:07,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:07,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:07,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:07,575 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 05:39:07,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061843438] [2020-10-27 05:39:07,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:07,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:39:07,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688856248] [2020-10-27 05:39:07,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:39:07,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:07,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:39:07,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:39:07,581 INFO L87 Difference]: Start difference. First operand 8379 states and 12318 transitions. Second operand 12 states. [2020-10-27 05:39:07,959 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 151 [2020-10-27 05:39:09,601 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:39:10,046 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 160 [2020-10-27 05:39:14,265 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 156 [2020-10-27 05:39:14,507 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:39:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:24,924 INFO L93 Difference]: Finished difference Result 57075 states and 82926 transitions. [2020-10-27 05:39:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 05:39:24,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-27 05:39:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:25,012 INFO L225 Difference]: With dead ends: 57075 [2020-10-27 05:39:25,013 INFO L226 Difference]: Without dead ends: 55958 [2020-10-27 05:39:25,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=649, Invalid=2773, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 05:39:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55958 states. [2020-10-27 05:39:27,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55958 to 8356. [2020-10-27 05:39:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8356 states. [2020-10-27 05:39:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8356 states to 8356 states and 12277 transitions. [2020-10-27 05:39:27,124 INFO L78 Accepts]: Start accepts. Automaton has 8356 states and 12277 transitions. Word has length 61 [2020-10-27 05:39:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:27,124 INFO L481 AbstractCegarLoop]: Abstraction has 8356 states and 12277 transitions. [2020-10-27 05:39:27,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:39:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 8356 states and 12277 transitions. [2020-10-27 05:39:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:39:27,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:27,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:27,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:39:27,126 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:27,127 INFO L82 PathProgramCache]: Analyzing trace with hash -498305663, now seen corresponding path program 1 times [2020-10-27 05:39:27,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:27,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499838019] [2020-10-27 05:39:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:27,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:27,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:27,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:29,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:29,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:39:29,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:39:29,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2584 [2020-10-27 05:39:29,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:39:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:39:29,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:30,016 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:39:30,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:30,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:30,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:30,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:30,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:39:30,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:30,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:30,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:30,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:30,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:39:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:30,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499838019] [2020-10-27 05:39:30,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:30,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:39:30,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301965850] [2020-10-27 05:39:30,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:39:30,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:30,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:39:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:39:30,093 INFO L87 Difference]: Start difference. First operand 8356 states and 12277 transitions. Second operand 8 states. [2020-10-27 05:39:30,354 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:39:31,102 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:39:33,108 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:39:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:36,170 INFO L93 Difference]: Finished difference Result 25475 states and 37234 transitions. [2020-10-27 05:39:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:39:36,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-27 05:39:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:36,191 INFO L225 Difference]: With dead ends: 25475 [2020-10-27 05:39:36,191 INFO L226 Difference]: Without dead ends: 17627 [2020-10-27 05:39:36,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:39:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17627 states. [2020-10-27 05:39:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17627 to 8107. [2020-10-27 05:39:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8107 states. [2020-10-27 05:39:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8107 states to 8107 states and 11883 transitions. [2020-10-27 05:39:37,965 INFO L78 Accepts]: Start accepts. Automaton has 8107 states and 11883 transitions. Word has length 61 [2020-10-27 05:39:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:37,966 INFO L481 AbstractCegarLoop]: Abstraction has 8107 states and 11883 transitions. [2020-10-27 05:39:37,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:39:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8107 states and 11883 transitions. [2020-10-27 05:39:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:39:37,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:37,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:37,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:39:37,968 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1882877063, now seen corresponding path program 1 times [2020-10-27 05:39:37,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:37,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454797317] [2020-10-27 05:39:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:37,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:38,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:38,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:38,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:39,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:39,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:39:39,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:39:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1254 [2020-10-27 05:39:39,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:39:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:39:39,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:39,527 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:39:39,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:39,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:39,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:39,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:39,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:39,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:39:39,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:39,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:39,589 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 05:39:39,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454797317] [2020-10-27 05:39:39,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:39,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:39:39,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152805871] [2020-10-27 05:39:39,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:39:39,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:39:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:39:39,591 INFO L87 Difference]: Start difference. First operand 8107 states and 11883 transitions. Second operand 8 states. [2020-10-27 05:39:39,771 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:39:40,546 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:39:42,104 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:39:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:46,755 INFO L93 Difference]: Finished difference Result 31019 states and 45255 transitions. [2020-10-27 05:39:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:39:46,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-27 05:39:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:46,780 INFO L225 Difference]: With dead ends: 31019 [2020-10-27 05:39:46,780 INFO L226 Difference]: Without dead ends: 23446 [2020-10-27 05:39:46,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:39:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23446 states. [2020-10-27 05:39:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23446 to 7964. [2020-10-27 05:39:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-10-27 05:39:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 11622 transitions. [2020-10-27 05:39:48,658 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 11622 transitions. Word has length 61 [2020-10-27 05:39:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:48,658 INFO L481 AbstractCegarLoop]: Abstraction has 7964 states and 11622 transitions. [2020-10-27 05:39:48,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:39:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 11622 transitions. [2020-10-27 05:39:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 05:39:48,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:48,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:48,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:39:48,661 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:48,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1985791164, now seen corresponding path program 1 times [2020-10-27 05:39:48,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:48,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466305410] [2020-10-27 05:39:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:48,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:48,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:48,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:49,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:49,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:49,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 05:39:49,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:39:49,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-27 05:39:49,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:49,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:39:49,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:39:49,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:39:49,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:50,041 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:39:50,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:50,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:50,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:50,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:50,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:50,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:39:50,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:50,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:50,066 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 05:39:50,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466305410] [2020-10-27 05:39:50,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:50,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:39:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994621753] [2020-10-27 05:39:50,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:39:50,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:39:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:39:50,068 INFO L87 Difference]: Start difference. First operand 7964 states and 11622 transitions. Second operand 10 states. [2020-10-27 05:39:50,265 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 05:39:52,887 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:39:53,090 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:39:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:57,019 INFO L93 Difference]: Finished difference Result 26090 states and 38216 transitions. [2020-10-27 05:39:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:39:57,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-27 05:39:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:57,043 INFO L225 Difference]: With dead ends: 26090 [2020-10-27 05:39:57,044 INFO L226 Difference]: Without dead ends: 20772 [2020-10-27 05:39:57,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:39:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20772 states. [2020-10-27 05:39:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20772 to 11143. [2020-10-27 05:39:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11143 states. [2020-10-27 05:39:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 16282 transitions. [2020-10-27 05:39:59,681 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 16282 transitions. Word has length 64 [2020-10-27 05:39:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:59,681 INFO L481 AbstractCegarLoop]: Abstraction has 11143 states and 16282 transitions. [2020-10-27 05:39:59,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:39:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 16282 transitions. [2020-10-27 05:39:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:39:59,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:59,687 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, 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 05:39:59,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:39:59,687 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:59,688 INFO L82 PathProgramCache]: Analyzing trace with hash 405984012, now seen corresponding path program 1 times [2020-10-27 05:39:59,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:59,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834994949] [2020-10-27 05:39:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:59,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:59,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:59,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:00,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:00,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:40:00,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:40:00,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-27 05:40:00,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:00,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:00,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 05:40:00,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 05:40:00,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:00,894 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:40:00,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:00,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:00,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:00,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:00,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:00,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:40:00,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:00,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:40:00,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:00,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:40:00,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:00,919 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 05:40:00,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834994949] [2020-10-27 05:40:00,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:00,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:40:00,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128947946] [2020-10-27 05:40:00,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:40:00,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:40:00,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:40:00,921 INFO L87 Difference]: Start difference. First operand 11143 states and 16282 transitions. Second operand 4 states. [2020-10-27 05:40:01,120 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:40:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:06,563 INFO L93 Difference]: Finished difference Result 30870 states and 44987 transitions. [2020-10-27 05:40:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:40:06,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-27 05:40:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:06,597 INFO L225 Difference]: With dead ends: 30870 [2020-10-27 05:40:06,597 INFO L226 Difference]: Without dead ends: 20277 [2020-10-27 05:40:06,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:40:06,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20277 states. [2020-10-27 05:40:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20277 to 18624. [2020-10-27 05:40:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18624 states. [2020-10-27 05:40:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18624 states to 18624 states and 26978 transitions. [2020-10-27 05:40:11,074 INFO L78 Accepts]: Start accepts. Automaton has 18624 states and 26978 transitions. Word has length 77 [2020-10-27 05:40:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:11,074 INFO L481 AbstractCegarLoop]: Abstraction has 18624 states and 26978 transitions. [2020-10-27 05:40:11,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:40:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 18624 states and 26978 transitions. [2020-10-27 05:40:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:40:11,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:11,079 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, 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 05:40:11,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:40:11,079 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:11,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1433044957, now seen corresponding path program 1 times [2020-10-27 05:40:11,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:11,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399691477] [2020-10-27 05:40:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:11,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:11,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:12,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:13,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:13,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:40:13,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:40:13,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2653 [2020-10-27 05:40:13,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:13,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:40:13,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:40:13,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:40:13,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:13,972 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-10-27 05:40:14,297 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:40:14,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:14,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:14,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:14,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:14,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:14,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:40:14,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:14,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:40:14,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:14,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:40:14,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:14,332 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 05:40:14,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399691477] [2020-10-27 05:40:14,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:14,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:40:14,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658193013] [2020-10-27 05:40:14,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:40:14,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:14,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:40:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:40:14,334 INFO L87 Difference]: Start difference. First operand 18624 states and 26978 transitions. Second operand 11 states. [2020-10-27 05:40:14,863 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-27 05:40:15,237 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 05:40:15,385 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 05:40:15,538 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 05:40:15,705 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 05:40:15,883 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-27 05:40:19,068 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 05:40:19,630 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 168 [2020-10-27 05:40:20,538 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 172 [2020-10-27 05:40:21,134 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:40:21,946 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 168 [2020-10-27 05:40:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:49,354 INFO L93 Difference]: Finished difference Result 117337 states and 170566 transitions. [2020-10-27 05:40:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:40:49,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-10-27 05:40:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:49,531 INFO L225 Difference]: With dead ends: 117337 [2020-10-27 05:40:49,532 INFO L226 Difference]: Without dead ends: 105332 [2020-10-27 05:40:49,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:40:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105332 states. [2020-10-27 05:40:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105332 to 26515. [2020-10-27 05:40:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26515 states. [2020-10-27 05:40:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26515 states to 26515 states and 38409 transitions. [2020-10-27 05:40:57,935 INFO L78 Accepts]: Start accepts. Automaton has 26515 states and 38409 transitions. Word has length 78 [2020-10-27 05:40:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:57,936 INFO L481 AbstractCegarLoop]: Abstraction has 26515 states and 38409 transitions. [2020-10-27 05:40:57,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:40:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 26515 states and 38409 transitions. [2020-10-27 05:40:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:40:57,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:57,943 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, 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 05:40:57,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:40:57,943 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:57,944 INFO L82 PathProgramCache]: Analyzing trace with hash 879365833, now seen corresponding path program 1 times [2020-10-27 05:40:57,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:57,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886159069] [2020-10-27 05:40:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:57,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:58,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:58,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:58,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:58,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:40:58,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:40:58,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 05:40:58,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:58,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:58,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 05:40:58,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 05:40:58,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:58,544 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:40:58,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:58,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:58,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:58,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:58,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:58,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:40:58,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:58,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:40:58,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:58,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:40:58,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:58,576 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 05:40:58,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886159069] [2020-10-27 05:40:58,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:58,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:40:58,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324563518] [2020-10-27 05:40:58,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:40:58,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:58,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:40:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:40:58,579 INFO L87 Difference]: Start difference. First operand 26515 states and 38409 transitions. Second operand 4 states. [2020-10-27 05:40:58,776 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:41:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:13,515 INFO L93 Difference]: Finished difference Result 74077 states and 106639 transitions. [2020-10-27 05:41:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:41:13,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-27 05:41:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:13,573 INFO L225 Difference]: With dead ends: 74077 [2020-10-27 05:41:13,573 INFO L226 Difference]: Without dead ends: 48224 [2020-10-27 05:41:13,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:41:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48224 states. [2020-10-27 05:41:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48224 to 44633. [2020-10-27 05:41:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44633 states. [2020-10-27 05:41:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44633 states to 44633 states and 63529 transitions. [2020-10-27 05:41:26,583 INFO L78 Accepts]: Start accepts. Automaton has 44633 states and 63529 transitions. Word has length 78 [2020-10-27 05:41:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:26,583 INFO L481 AbstractCegarLoop]: Abstraction has 44633 states and 63529 transitions. [2020-10-27 05:41:26,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:41:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 44633 states and 63529 transitions. [2020-10-27 05:41:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:41:26,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:26,587 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, 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 05:41:26,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:41:26,587 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:26,587 INFO L82 PathProgramCache]: Analyzing trace with hash 117290943, now seen corresponding path program 1 times [2020-10-27 05:41:26,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:26,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909294637] [2020-10-27 05:41:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:26,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:26,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:26,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:26,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:26,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking...