/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:23:50,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:23:50,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:23:50,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:23:50,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:23:50,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:23:50,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:23:50,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:23:50,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:23:50,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:23:50,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:23:50,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:23:50,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:23:50,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:23:50,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:23:50,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:23:50,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:23:50,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:23:50,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:23:50,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:23:50,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:23:50,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:23:50,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:23:50,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:23:50,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:23:50,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:23:50,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:23:50,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:23:50,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:23:50,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:23:50,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:23:50,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:23:50,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:23:50,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:23:50,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:23:50,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:23:50,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:23:50,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:23:50,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:23:50,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:23:50,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:23:50,946 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 [2020-10-29 13:23:50,971 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:23:50,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:23:50,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:23:50,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:23:50,974 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:23:50,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:23:50,974 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:23:50,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:23:50,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:23:50,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:23:50,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:23:50,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:23:50,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:23:50,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:23:50,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:23:50,977 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:23:50,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:23:50,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:23:50,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:23:50,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:23:50,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:23:50,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:23:50,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:23:50,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:23:50,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:23:50,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:23:50,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:23:50,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:23:50,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:23:50,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:23:51,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:23:51,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:23:51,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:23:51,434 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:23:51,435 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:23:51,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:23:51,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8973d57ed/e2a21c2f2cf84f1a88c3560bb7c39b51/FLAG64ab5085c [2020-10-29 13:23:52,176 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:23:52,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:23:52,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8973d57ed/e2a21c2f2cf84f1a88c3560bb7c39b51/FLAG64ab5085c [2020-10-29 13:23:52,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8973d57ed/e2a21c2f2cf84f1a88c3560bb7c39b51 [2020-10-29 13:23:52,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:23:52,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:23:52,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:23:52,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:23:52,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:23:52,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:23:52" (1/1) ... [2020-10-29 13:23:52,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a52b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52, skipping insertion in model container [2020-10-29 13:23:52,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:23:52" (1/1) ... [2020-10-29 13:23:52,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:23:52,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:23:52,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:23:52,852 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:23:52,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:23:52,963 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:23:52,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52 WrapperNode [2020-10-29 13:23:52,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:23:52,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:23:52,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:23:52,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:23:52,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52" (1/1) ... [2020-10-29 13:23:52,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52" (1/1) ... [2020-10-29 13:23:52,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52" (1/1) ... [2020-10-29 13:23:52,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52" (1/1) ... [2020-10-29 13:23:53,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52" (1/1) ... [2020-10-29 13:23:53,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52" (1/1) ... [2020-10-29 13:23:53,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52" (1/1) ... [2020-10-29 13:23:53,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:23:53,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:23:53,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:23:53,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:23:53,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52" (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 [2020-10-29 13:23:53,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:23:53,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:23:53,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:23:53,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:23:53,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:23:53,132 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:23:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:23:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:23:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:23:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:23:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:23:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:23:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:23:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:23:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:23:53,136 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:23:53,136 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:23:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:23:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:23:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:23:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:23:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:23:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:23:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:23:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:23:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:23:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:23:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:23:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:23:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:23:54,081 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:23:54,082 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:23:54,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:23:54 BoogieIcfgContainer [2020-10-29 13:23:54,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:23:54,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:23:54,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:23:54,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:23:54,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:23:52" (1/3) ... [2020-10-29 13:23:54,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7869796e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:23:54, skipping insertion in model container [2020-10-29 13:23:54,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:52" (2/3) ... [2020-10-29 13:23:54,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7869796e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:23:54, skipping insertion in model container [2020-10-29 13:23:54,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:23:54" (3/3) ... [2020-10-29 13:23:54,097 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:23:54,109 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:23:54,119 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:23:54,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:23:54,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:23:54,173 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:23:54,174 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:23:54,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:23:54,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:23:54,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:23:54,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:23:54,174 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:23:54,209 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2020-10-29 13:23:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:23:54,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:23:54,219 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] [2020-10-29 13:23:54,220 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:23:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:23:54,226 INFO L82 PathProgramCache]: Analyzing trace with hash 453713683, now seen corresponding path program 1 times [2020-10-29 13:23:54,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:23:54,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228873773] [2020-10-29 13:23:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:23:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:54,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:54,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:55,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:56,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:59,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:59,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:23:59,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:23:59,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:23:59,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:59,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:59,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:23:59,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:23:59,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:23:59,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-10-29 13:23:59,969 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:23:59,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:23:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:59,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:00,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:00,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:00,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:00,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:24:00,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:00,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:00,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:00,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:00,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:00,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:24:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:00,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228873773] [2020-10-29 13:24:00,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:00,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:24:00,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166023056] [2020-10-29 13:24:00,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:24:00,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:00,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:24:00,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:24:00,084 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 8 states. [2020-10-29 13:24:00,447 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:24:01,561 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:24:01,801 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:24:02,006 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:24:02,195 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:24:02,452 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:24:02,701 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:24:02,928 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:24:03,136 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:24:03,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:03,226 INFO L93 Difference]: Finished difference Result 762 states and 1204 transitions. [2020-10-29 13:24:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 13:24:03,228 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-29 13:24:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:03,250 INFO L225 Difference]: With dead ends: 762 [2020-10-29 13:24:03,251 INFO L226 Difference]: Without dead ends: 668 [2020-10-29 13:24:03,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-29 13:24:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-10-29 13:24:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 161. [2020-10-29 13:24:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-29 13:24:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 232 transitions. [2020-10-29 13:24:03,363 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 232 transitions. Word has length 65 [2020-10-29 13:24:03,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:03,365 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 232 transitions. [2020-10-29 13:24:03,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:24:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 232 transitions. [2020-10-29 13:24:03,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:24:03,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:03,378 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] [2020-10-29 13:24:03,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:24:03,379 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash -203917944, now seen corresponding path program 1 times [2020-10-29 13:24:03,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:03,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877886614] [2020-10-29 13:24:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:03,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:03,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:03,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:03,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:03,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:04,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:06,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:08,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:08,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:24:08,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:24:08,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:24:08,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:08,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:08,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:24:08,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:08,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:24:08,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:08,820 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:08,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:08,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:08,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:08,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:08,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:08,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:24:08,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:08,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:08,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:08,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:08,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:08,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:08,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877886614] [2020-10-29 13:24:08,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:08,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:24:08,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581139024] [2020-10-29 13:24:08,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:24:08,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:08,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:24:08,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:24:08,894 INFO L87 Difference]: Start difference. First operand 161 states and 232 transitions. Second operand 7 states. [2020-10-29 13:24:09,126 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:24:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:09,798 INFO L93 Difference]: Finished difference Result 478 states and 731 transitions. [2020-10-29 13:24:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:24:09,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-29 13:24:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:09,802 INFO L225 Difference]: With dead ends: 478 [2020-10-29 13:24:09,802 INFO L226 Difference]: Without dead ends: 355 [2020-10-29 13:24:09,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:24:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-29 13:24:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 220. [2020-10-29 13:24:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-29 13:24:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 324 transitions. [2020-10-29 13:24:09,835 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 324 transitions. Word has length 67 [2020-10-29 13:24:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:09,836 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 324 transitions. [2020-10-29 13:24:09,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:24:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 324 transitions. [2020-10-29 13:24:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:24:09,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:09,837 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] [2020-10-29 13:24:09,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:24:09,838 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash 532183938, now seen corresponding path program 1 times [2020-10-29 13:24:09,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:09,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194220237] [2020-10-29 13:24:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:09,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:09,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:09,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:10,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:10,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:10,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:11,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:14,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:14,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:24:14,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:24:14,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:24:14,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:14,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:14,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:24:14,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:14,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:24:14,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:24:15,130 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:15,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:15,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:15,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:15,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:15,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:15,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 13:24:15,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:15,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:15,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:15,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194220237] [2020-10-29 13:24:15,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:15,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:24:15,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998563098] [2020-10-29 13:24:15,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:24:15,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:15,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:24:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:24:15,211 INFO L87 Difference]: Start difference. First operand 220 states and 324 transitions. Second operand 7 states. [2020-10-29 13:24:15,441 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:24:16,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:16,144 INFO L93 Difference]: Finished difference Result 473 states and 722 transitions. [2020-10-29 13:24:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:24:16,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-29 13:24:16,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:16,148 INFO L225 Difference]: With dead ends: 473 [2020-10-29 13:24:16,148 INFO L226 Difference]: Without dead ends: 350 [2020-10-29 13:24:16,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:24:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-29 13:24:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 240. [2020-10-29 13:24:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-29 13:24:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 354 transitions. [2020-10-29 13:24:16,186 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 354 transitions. Word has length 67 [2020-10-29 13:24:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:16,188 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 354 transitions. [2020-10-29 13:24:16,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:24:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 354 transitions. [2020-10-29 13:24:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:24:16,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:16,193 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] [2020-10-29 13:24:16,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:24:16,193 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash 302271320, now seen corresponding path program 1 times [2020-10-29 13:24:16,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:16,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516494169] [2020-10-29 13:24:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:16,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:16,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:16,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:16,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:17,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:18,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:18,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:24:18,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:24:18,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2603 [2020-10-29 13:24:18,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:18,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:24:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:24:18,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:19,123 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:19,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:19,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:19,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:19,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:19,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:24:19,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:19,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:19,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516494169] [2020-10-29 13:24:19,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:19,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:24:19,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708084247] [2020-10-29 13:24:19,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:24:19,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:24:19,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:24:19,166 INFO L87 Difference]: Start difference. First operand 240 states and 354 transitions. Second operand 4 states. [2020-10-29 13:24:19,368 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:24:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:19,803 INFO L93 Difference]: Finished difference Result 604 states and 921 transitions. [2020-10-29 13:24:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:24:19,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-29 13:24:19,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:19,808 INFO L225 Difference]: With dead ends: 604 [2020-10-29 13:24:19,808 INFO L226 Difference]: Without dead ends: 409 [2020-10-29 13:24:19,814 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 [2020-10-29 13:24:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-29 13:24:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 404. [2020-10-29 13:24:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-29 13:24:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 606 transitions. [2020-10-29 13:24:19,874 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 606 transitions. Word has length 67 [2020-10-29 13:24:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:19,874 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 606 transitions. [2020-10-29 13:24:19,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:24:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 606 transitions. [2020-10-29 13:24:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:24:19,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:19,876 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] [2020-10-29 13:24:19,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:24:19,876 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:19,877 INFO L82 PathProgramCache]: Analyzing trace with hash 923800953, now seen corresponding path program 1 times [2020-10-29 13:24:19,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:19,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499619531] [2020-10-29 13:24:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:19,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:19,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:20,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:20,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:22,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:22,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:24:22,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:24:22,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2726 [2020-10-29 13:24:22,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:22,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:22,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:24:22,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:24:22,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:24:22,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:22,957 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:22,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:22,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:22,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:22,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:22,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:24:22,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:22,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:22,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:22,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:22,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:23,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499619531] [2020-10-29 13:24:23,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:23,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:24:23,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622183535] [2020-10-29 13:24:23,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:24:23,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:23,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:24:23,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:24:23,021 INFO L87 Difference]: Start difference. First operand 404 states and 606 transitions. Second operand 8 states. [2020-10-29 13:24:23,306 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:24:24,058 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:24:24,250 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:24:24,547 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:24:24,779 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:24:25,003 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:24:25,418 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:24:25,689 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:24:25,971 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:24:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:26,028 INFO L93 Difference]: Finished difference Result 1514 states and 2326 transitions. [2020-10-29 13:24:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 13:24:26,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:24:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:26,037 INFO L225 Difference]: With dead ends: 1514 [2020-10-29 13:24:26,037 INFO L226 Difference]: Without dead ends: 1284 [2020-10-29 13:24:26,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-29 13:24:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2020-10-29 13:24:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 404. [2020-10-29 13:24:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-29 13:24:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 604 transitions. [2020-10-29 13:24:26,107 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 604 transitions. Word has length 67 [2020-10-29 13:24:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:26,109 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 604 transitions. [2020-10-29 13:24:26,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:24:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 604 transitions. [2020-10-29 13:24:26,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:24:26,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:26,110 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] [2020-10-29 13:24:26,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:24:26,111 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:26,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1132681230, now seen corresponding path program 1 times [2020-10-29 13:24:26,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:26,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067589699] [2020-10-29 13:24:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:26,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:26,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:26,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:26,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:26,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:28,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:31,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:31,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:24:31,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:24:31,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:24:31,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:31,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:24:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:24:31,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:31,467 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:31,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:31,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:31,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:31,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:31,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 13:24:31,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:31,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:31,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:31,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:31,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:31,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:24:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:31,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067589699] [2020-10-29 13:24:31,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:31,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:24:31,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032968996] [2020-10-29 13:24:31,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:24:31,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:31,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:24:31,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:24:31,576 INFO L87 Difference]: Start difference. First operand 404 states and 604 transitions. Second operand 7 states. [2020-10-29 13:24:31,822 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:24:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:32,494 INFO L93 Difference]: Finished difference Result 970 states and 1475 transitions. [2020-10-29 13:24:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:24:32,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-29 13:24:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:32,500 INFO L225 Difference]: With dead ends: 970 [2020-10-29 13:24:32,500 INFO L226 Difference]: Without dead ends: 676 [2020-10-29 13:24:32,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:24:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-10-29 13:24:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 396. [2020-10-29 13:24:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-29 13:24:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 584 transitions. [2020-10-29 13:24:32,559 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 584 transitions. Word has length 67 [2020-10-29 13:24:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:32,559 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 584 transitions. [2020-10-29 13:24:32,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:24:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 584 transitions. [2020-10-29 13:24:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:24:32,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:32,561 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] [2020-10-29 13:24:32,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:24:32,561 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1979130644, now seen corresponding path program 1 times [2020-10-29 13:24:32,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:32,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49559625] [2020-10-29 13:24:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:32,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:32,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:32,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:32,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:34,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:37,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:37,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:24:37,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:24:37,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:24:37,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:37,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:37,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:24:37,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:37,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:24:37,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:37,948 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:37,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:37,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:37,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:37,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:37,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:37,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 13:24:37,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:37,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:37,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:37,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:37,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:37,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:38,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49559625] [2020-10-29 13:24:38,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:38,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:24:38,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90662825] [2020-10-29 13:24:38,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:24:38,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:24:38,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:24:38,056 INFO L87 Difference]: Start difference. First operand 396 states and 584 transitions. Second operand 7 states. [2020-10-29 13:24:38,327 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:24:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:38,990 INFO L93 Difference]: Finished difference Result 1012 states and 1532 transitions. [2020-10-29 13:24:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:24:38,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-29 13:24:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:38,994 INFO L225 Difference]: With dead ends: 1012 [2020-10-29 13:24:38,994 INFO L226 Difference]: Without dead ends: 688 [2020-10-29 13:24:38,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:24:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-10-29 13:24:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 368. [2020-10-29 13:24:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-29 13:24:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 538 transitions. [2020-10-29 13:24:39,050 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 538 transitions. Word has length 67 [2020-10-29 13:24:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:39,051 INFO L481 AbstractCegarLoop]: Abstraction has 368 states and 538 transitions. [2020-10-29 13:24:39,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:24:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 538 transitions. [2020-10-29 13:24:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:24:39,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:39,059 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] [2020-10-29 13:24:39,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:24:39,059 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:39,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1266558041, now seen corresponding path program 1 times [2020-10-29 13:24:39,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:39,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536517495] [2020-10-29 13:24:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:39,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:39,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:39,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:39,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:39,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:39,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:40,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:42,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:44,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:44,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:24:44,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:24:44,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:24:44,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:44,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:44,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:24:44,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:44,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:24:44,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:24:44,379 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:44,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:44,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:44,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:44,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:44,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:44,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:24:44,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:44,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:44,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:44,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:44,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:44,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536517495] [2020-10-29 13:24:44,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:44,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:24:44,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428048967] [2020-10-29 13:24:44,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:24:44,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:44,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:24:44,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:24:44,447 INFO L87 Difference]: Start difference. First operand 368 states and 538 transitions. Second operand 7 states. [2020-10-29 13:24:44,664 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:24:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:45,360 INFO L93 Difference]: Finished difference Result 710 states and 1069 transitions. [2020-10-29 13:24:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:24:45,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-29 13:24:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:45,367 INFO L225 Difference]: With dead ends: 710 [2020-10-29 13:24:45,367 INFO L226 Difference]: Without dead ends: 525 [2020-10-29 13:24:45,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:24:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-29 13:24:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 336. [2020-10-29 13:24:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-29 13:24:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 491 transitions. [2020-10-29 13:24:45,415 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 491 transitions. Word has length 68 [2020-10-29 13:24:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:45,416 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 491 transitions. [2020-10-29 13:24:45,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:24:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 491 transitions. [2020-10-29 13:24:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:24:45,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:45,417 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] [2020-10-29 13:24:45,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:24:45,418 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:45,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2144055195, now seen corresponding path program 1 times [2020-10-29 13:24:45,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:45,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41008308] [2020-10-29 13:24:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:45,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:45,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:45,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:45,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:45,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:45,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:49,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:49,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:24:49,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:24:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4483 [2020-10-29 13:24:49,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:49,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:24:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:24:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:24:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:50,167 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:50,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:50,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:50,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:50,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:50,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:50,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:24:50,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:50,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:50,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41008308] [2020-10-29 13:24:50,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:50,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:24:50,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861297110] [2020-10-29 13:24:50,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:24:50,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:50,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:24:50,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:24:50,233 INFO L87 Difference]: Start difference. First operand 336 states and 491 transitions. Second operand 5 states. [2020-10-29 13:24:50,493 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:24:51,167 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:24:51,355 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:24:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:51,619 INFO L93 Difference]: Finished difference Result 584 states and 876 transitions. [2020-10-29 13:24:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:24:51,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 13:24:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:51,624 INFO L225 Difference]: With dead ends: 584 [2020-10-29 13:24:51,624 INFO L226 Difference]: Without dead ends: 461 [2020-10-29 13:24:51,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:24:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-29 13:24:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2020-10-29 13:24:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-29 13:24:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 672 transitions. [2020-10-29 13:24:51,712 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 672 transitions. Word has length 68 [2020-10-29 13:24:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:51,713 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 672 transitions. [2020-10-29 13:24:51,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:24:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 672 transitions. [2020-10-29 13:24:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:24:51,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:51,714 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] [2020-10-29 13:24:51,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:24:51,714 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:51,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:51,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1486310900, now seen corresponding path program 1 times [2020-10-29 13:24:51,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:51,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021569656] [2020-10-29 13:24:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:51,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:51,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:51,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:51,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:52,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:53,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:53,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:24:53,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:24:53,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1429 [2020-10-29 13:24:53,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:53,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:53,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:53,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:24:53,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:24:53,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:53,373 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:53,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:53,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:53,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:53,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:53,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:53,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:24:53,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:53,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:53,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:53,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021569656] [2020-10-29 13:24:53,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:53,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:24:53,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226660812] [2020-10-29 13:24:53,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:24:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:53,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:24:53,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:24:53,407 INFO L87 Difference]: Start difference. First operand 453 states and 672 transitions. Second operand 4 states. [2020-10-29 13:24:53,638 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:24:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:54,215 INFO L93 Difference]: Finished difference Result 1125 states and 1710 transitions. [2020-10-29 13:24:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:24:54,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-29 13:24:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:54,220 INFO L225 Difference]: With dead ends: 1125 [2020-10-29 13:24:54,220 INFO L226 Difference]: Without dead ends: 748 [2020-10-29 13:24:54,221 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 [2020-10-29 13:24:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-29 13:24:54,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 745. [2020-10-29 13:24:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2020-10-29 13:24:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1119 transitions. [2020-10-29 13:24:54,327 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1119 transitions. Word has length 68 [2020-10-29 13:24:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:54,327 INFO L481 AbstractCegarLoop]: Abstraction has 745 states and 1119 transitions. [2020-10-29 13:24:54,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:24:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1119 transitions. [2020-10-29 13:24:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:24:54,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:54,328 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] [2020-10-29 13:24:54,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:24:54,329 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:54,330 INFO L82 PathProgramCache]: Analyzing trace with hash -609077188, now seen corresponding path program 1 times [2020-10-29 13:24:54,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:54,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929897627] [2020-10-29 13:24:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:55,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:56,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:56,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:24:56,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:24:56,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2012 [2020-10-29 13:24:56,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:56,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:56,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:24:56,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:56,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:24:56,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:56,590 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:56,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:56,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:56,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:56,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:56,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:56,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:24:56,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:56,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:56,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:56,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929897627] [2020-10-29 13:24:56,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:56,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:24:56,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761458037] [2020-10-29 13:24:56,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:24:56,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:56,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:24:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:24:56,656 INFO L87 Difference]: Start difference. First operand 745 states and 1119 transitions. Second operand 6 states. [2020-10-29 13:24:56,890 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:24:57,598 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:24:57,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:57,725 INFO L93 Difference]: Finished difference Result 2055 states and 3133 transitions. [2020-10-29 13:24:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:24:57,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:24:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:57,735 INFO L225 Difference]: With dead ends: 2055 [2020-10-29 13:24:57,735 INFO L226 Difference]: Without dead ends: 1382 [2020-10-29 13:24:57,737 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 [2020-10-29 13:24:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2020-10-29 13:24:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1379. [2020-10-29 13:24:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1379 states. [2020-10-29 13:24:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 2089 transitions. [2020-10-29 13:24:57,939 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 2089 transitions. Word has length 69 [2020-10-29 13:24:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:57,940 INFO L481 AbstractCegarLoop]: Abstraction has 1379 states and 2089 transitions. [2020-10-29 13:24:57,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:24:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 2089 transitions. [2020-10-29 13:24:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:24:57,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:57,941 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] [2020-10-29 13:24:57,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:24:57,941 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:57,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:57,942 INFO L82 PathProgramCache]: Analyzing trace with hash 364885921, now seen corresponding path program 1 times [2020-10-29 13:24:57,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:57,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418822594] [2020-10-29 13:24:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:57,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:58,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:58,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:58,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:58,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:58,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:24:58,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:24:58,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-29 13:24:58,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:58,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:24:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:24:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:58,867 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:24:58,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:58,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:58,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:58,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:58,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:58,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:24:58,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:58,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:58,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:58,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:58,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:58,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:58,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418822594] [2020-10-29 13:24:58,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:58,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:24:58,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361136436] [2020-10-29 13:24:58,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:24:58,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:24:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:24:58,904 INFO L87 Difference]: Start difference. First operand 1379 states and 2089 transitions. Second operand 4 states. [2020-10-29 13:24:59,131 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:24:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:59,984 INFO L93 Difference]: Finished difference Result 3741 states and 5705 transitions. [2020-10-29 13:24:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:24:59,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-29 13:24:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:59,998 INFO L225 Difference]: With dead ends: 3741 [2020-10-29 13:24:59,998 INFO L226 Difference]: Without dead ends: 2458 [2020-10-29 13:25:00,003 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 [2020-10-29 13:25:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2020-10-29 13:25:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2441. [2020-10-29 13:25:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2441 states. [2020-10-29 13:25:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 3685 transitions. [2020-10-29 13:25:00,425 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 3685 transitions. Word has length 69 [2020-10-29 13:25:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:00,426 INFO L481 AbstractCegarLoop]: Abstraction has 2441 states and 3685 transitions. [2020-10-29 13:25:00,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:25:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 3685 transitions. [2020-10-29 13:25:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:25:00,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:00,427 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] [2020-10-29 13:25:00,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:25:00,427 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:00,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1220941933, now seen corresponding path program 1 times [2020-10-29 13:25:00,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:00,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398091017] [2020-10-29 13:25:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:00,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:00,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:00,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:01,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:01,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:25:01,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:25:01,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1113 [2020-10-29 13:25:01,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:01,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:25:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:25:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:25:01,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:01,780 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:25:01,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:01,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:01,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:01,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:01,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:01,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:25:01,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:01,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:01,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:25:01,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:01,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:25:01,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:01,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398091017] [2020-10-29 13:25:01,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:01,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:25:01,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965768339] [2020-10-29 13:25:01,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:25:01,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:25:01,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:25:01,822 INFO L87 Difference]: Start difference. First operand 2441 states and 3685 transitions. Second operand 6 states. [2020-10-29 13:25:02,056 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:25:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:02,817 INFO L93 Difference]: Finished difference Result 4800 states and 7275 transitions. [2020-10-29 13:25:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:25:02,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-29 13:25:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:02,831 INFO L225 Difference]: With dead ends: 4800 [2020-10-29 13:25:02,831 INFO L226 Difference]: Without dead ends: 2441 [2020-10-29 13:25:02,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:25:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2020-10-29 13:25:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2441. [2020-10-29 13:25:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2441 states. [2020-10-29 13:25:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 3661 transitions. [2020-10-29 13:25:03,224 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 3661 transitions. Word has length 70 [2020-10-29 13:25:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:03,225 INFO L481 AbstractCegarLoop]: Abstraction has 2441 states and 3661 transitions. [2020-10-29 13:25:03,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:25:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 3661 transitions. [2020-10-29 13:25:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:25:03,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:03,226 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] [2020-10-29 13:25:03,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:25:03,227 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1992805586, now seen corresponding path program 1 times [2020-10-29 13:25:03,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:03,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274103822] [2020-10-29 13:25:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:03,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:03,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:03,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:03,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:03,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:25:03,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:25:03,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-29 13:25:03,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:03,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:03,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:25:03,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 13:25:03,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:25:03,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:03,956 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:25:03,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:03,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:03,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:03,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:03,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:03,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:25:03,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:03,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:03,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:03,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:03,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:03,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274103822] [2020-10-29 13:25:03,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:03,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:25:03,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207849063] [2020-10-29 13:25:03,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:25:03,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:03,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:25:03,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:25:03,998 INFO L87 Difference]: Start difference. First operand 2441 states and 3661 transitions. Second operand 4 states. [2020-10-29 13:25:04,239 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:25:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:05,197 INFO L93 Difference]: Finished difference Result 6775 states and 10169 transitions. [2020-10-29 13:25:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:25:05,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-29 13:25:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:05,215 INFO L225 Difference]: With dead ends: 6775 [2020-10-29 13:25:05,216 INFO L226 Difference]: Without dead ends: 4414 [2020-10-29 13:25:05,222 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 [2020-10-29 13:25:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4414 states. [2020-10-29 13:25:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4414 to 4385. [2020-10-29 13:25:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4385 states. [2020-10-29 13:25:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4385 states to 4385 states and 6517 transitions. [2020-10-29 13:25:05,973 INFO L78 Accepts]: Start accepts. Automaton has 4385 states and 6517 transitions. Word has length 70 [2020-10-29 13:25:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:05,974 INFO L481 AbstractCegarLoop]: Abstraction has 4385 states and 6517 transitions. [2020-10-29 13:25:05,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:25:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4385 states and 6517 transitions. [2020-10-29 13:25:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:25:05,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:05,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:05,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:25:05,975 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:05,976 INFO L82 PathProgramCache]: Analyzing trace with hash -498285894, now seen corresponding path program 1 times [2020-10-29 13:25:05,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:05,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964146456] [2020-10-29 13:25:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:06,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:06,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:06,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:06,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:25:06,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:25:06,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-29 13:25:06,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:06,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:25:06,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:25:06,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:25:06,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:25:06,509 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:25:06,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:06,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:06,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:06,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:06,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:25:06,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:06,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:06,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:06,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:06,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:06,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:06,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964146456] [2020-10-29 13:25:06,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:06,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:25:06,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886160724] [2020-10-29 13:25:06,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:25:06,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:06,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:25:06,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:25:06,547 INFO L87 Difference]: Start difference. First operand 4385 states and 6517 transitions. Second operand 4 states. [2020-10-29 13:25:06,767 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:25:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:08,084 INFO L93 Difference]: Finished difference Result 12279 states and 18185 transitions. [2020-10-29 13:25:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:25:08,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-29 13:25:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:08,119 INFO L225 Difference]: With dead ends: 12279 [2020-10-29 13:25:08,119 INFO L226 Difference]: Without dead ends: 7946 [2020-10-29 13:25:08,130 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 [2020-10-29 13:25:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2020-10-29 13:25:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 7934. [2020-10-29 13:25:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7934 states. [2020-10-29 13:25:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 11614 transitions. [2020-10-29 13:25:09,531 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 11614 transitions. Word has length 71 [2020-10-29 13:25:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:09,532 INFO L481 AbstractCegarLoop]: Abstraction has 7934 states and 11614 transitions. [2020-10-29 13:25:09,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:25:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 11614 transitions. [2020-10-29 13:25:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:25:09,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:09,533 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] [2020-10-29 13:25:09,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:25:09,533 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:09,534 INFO L82 PathProgramCache]: Analyzing trace with hash -397200469, now seen corresponding path program 1 times [2020-10-29 13:25:09,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:09,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083742800] [2020-10-29 13:25:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:09,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:09,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:09,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:09,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:25:09,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:25:09,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-29 13:25:09,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:09,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:09,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:25:09,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:25:09,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:25:09,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:10,104 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:25:10,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:10,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:10,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:10,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:10,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:10,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:25:10,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:10,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:25:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:25:10,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:10,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083742800] [2020-10-29 13:25:10,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:10,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:25:10,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138181539] [2020-10-29 13:25:10,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:25:10,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:10,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:25:10,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:25:10,157 INFO L87 Difference]: Start difference. First operand 7934 states and 11614 transitions. Second operand 6 states. [2020-10-29 13:25:10,441 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:25:11,417 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:25:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:12,869 INFO L93 Difference]: Finished difference Result 23620 states and 34562 transitions. [2020-10-29 13:25:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:25:12,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:25:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:12,905 INFO L225 Difference]: With dead ends: 23620 [2020-10-29 13:25:12,905 INFO L226 Difference]: Without dead ends: 15729 [2020-10-29 13:25:12,922 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 [2020-10-29 13:25:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15729 states. [2020-10-29 13:25:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15729 to 15726. [2020-10-29 13:25:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15726 states. [2020-10-29 13:25:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15726 states to 15726 states and 22894 transitions. [2020-10-29 13:25:15,105 INFO L78 Accepts]: Start accepts. Automaton has 15726 states and 22894 transitions. Word has length 72 [2020-10-29 13:25:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:15,105 INFO L481 AbstractCegarLoop]: Abstraction has 15726 states and 22894 transitions. [2020-10-29 13:25:15,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:25:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 15726 states and 22894 transitions. [2020-10-29 13:25:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:25:15,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:15,106 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] [2020-10-29 13:25:15,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:25:15,106 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:15,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:15,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1723828390, now seen corresponding path program 1 times [2020-10-29 13:25:15,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:15,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549230268] [2020-10-29 13:25:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:15,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:15,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:15,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:25:15,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:15,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-29 13:25:15,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:15,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:15,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:25:15,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 13:25:15,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:25:15,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:15,520 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:25:15,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:15,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:15,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:15,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:15,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:15,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:25:15,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:15,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:15,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:15,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:15,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:15,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:15,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549230268] [2020-10-29 13:25:15,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:15,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:25:15,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083703914] [2020-10-29 13:25:15,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:25:15,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:15,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:25:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:25:15,547 INFO L87 Difference]: Start difference. First operand 15726 states and 22894 transitions. Second operand 5 states. [2020-10-29 13:25:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:18,925 INFO L93 Difference]: Finished difference Result 24926 states and 36205 transitions. [2020-10-29 13:25:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:25:18,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 13:25:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:18,985 INFO L225 Difference]: With dead ends: 24926 [2020-10-29 13:25:18,985 INFO L226 Difference]: Without dead ends: 24923 [2020-10-29 13:25:18,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:25:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24923 states. [2020-10-29 13:25:21,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24923 to 15982. [2020-10-29 13:25:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15982 states. [2020-10-29 13:25:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15982 states to 15982 states and 23022 transitions. [2020-10-29 13:25:21,585 INFO L78 Accepts]: Start accepts. Automaton has 15982 states and 23022 transitions. Word has length 72 [2020-10-29 13:25:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:21,585 INFO L481 AbstractCegarLoop]: Abstraction has 15982 states and 23022 transitions. [2020-10-29 13:25:21,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:25:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 15982 states and 23022 transitions. [2020-10-29 13:25:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:25:21,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:21,594 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:21,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:25:21,594 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2101427831, now seen corresponding path program 1 times [2020-10-29 13:25:21,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:21,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150584596] [2020-10-29 13:25:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:21,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:22,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:22,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:22,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:23,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:26,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:26,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:25:26,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:25:26,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:25:26,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:26,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:26,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:25:26,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 13:25:26,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 13:25:26,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:26,853 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:25:26,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:26,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:26,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:26,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:26,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:26,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:25:26,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:26,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:26,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:26,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:26,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:26,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150584596] [2020-10-29 13:25:26,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:25:26,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:25:26,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616605696] [2020-10-29 13:25:26,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:25:26,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:26,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:25:26,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:25:26,891 INFO L87 Difference]: Start difference. First operand 15982 states and 23022 transitions. Second operand 6 states. [2020-10-29 13:25:27,136 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:25:28,216 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:25:28,548 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:25:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:32,106 INFO L93 Difference]: Finished difference Result 47156 states and 68477 transitions. [2020-10-29 13:25:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:25:32,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-29 13:25:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:32,191 INFO L225 Difference]: With dead ends: 47156 [2020-10-29 13:25:32,191 INFO L226 Difference]: Without dead ends: 31217 [2020-10-29 13:25:32,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:25:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31217 states. [2020-10-29 13:25:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31217 to 31150. [2020-10-29 13:25:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31150 states. [2020-10-29 13:25:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31150 states to 31150 states and 45038 transitions. [2020-10-29 13:25:37,072 INFO L78 Accepts]: Start accepts. Automaton has 31150 states and 45038 transitions. Word has length 99 [2020-10-29 13:25:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:37,072 INFO L481 AbstractCegarLoop]: Abstraction has 31150 states and 45038 transitions. [2020-10-29 13:25:37,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:25:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 31150 states and 45038 transitions. [2020-10-29 13:25:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:25:37,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:37,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:37,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:25:37,083 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1457437583, now seen corresponding path program 1 times [2020-10-29 13:25:37,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:37,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752829894] [2020-10-29 13:25:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:37,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:37,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:37,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:37,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:37,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:39,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:39,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:39,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:39,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:40,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:42,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:42,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:25:42,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:25:42,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:25:42,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:42,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:42,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:25:42,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 13:25:42,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:25:42,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:42,336 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:25:42,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:42,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:42,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:42,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:42,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:42,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:25:42,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:42,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:42,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:42,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752829894] [2020-10-29 13:25:42,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:25:42,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:25:42,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404164744] [2020-10-29 13:25:42,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:25:42,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:42,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:25:42,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:25:42,367 INFO L87 Difference]: Start difference. First operand 31150 states and 45038 transitions. Second operand 6 states. [2020-10-29 13:25:42,604 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:25:43,809 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:25:44,155 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:25:49,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:49,229 INFO L93 Difference]: Finished difference Result 74292 states and 107469 transitions. [2020-10-29 13:25:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:25:49,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-29 13:25:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:49,332 INFO L225 Difference]: With dead ends: 74292 [2020-10-29 13:25:49,332 INFO L226 Difference]: Without dead ends: 43185 [2020-10-29 13:25:49,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:25:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43185 states. [2020-10-29 13:25:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43185 to 41966. [2020-10-29 13:25:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41966 states. [2020-10-29 13:25:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41966 states to 41966 states and 60910 transitions. [2020-10-29 13:25:55,481 INFO L78 Accepts]: Start accepts. Automaton has 41966 states and 60910 transitions. Word has length 99 [2020-10-29 13:25:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:55,481 INFO L481 AbstractCegarLoop]: Abstraction has 41966 states and 60910 transitions. [2020-10-29 13:25:55,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:25:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 41966 states and 60910 transitions. [2020-10-29 13:25:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:25:55,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:55,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:55,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:25:55,492 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash -856940291, now seen corresponding path program 1 times [2020-10-29 13:25:55,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:55,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141051277] [2020-10-29 13:25:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:55,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:55,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:55,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:55,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:56,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:57,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:57,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:57,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:58,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:58,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:59,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:00,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:00,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:26:00,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:26:00,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 13:26:00,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:00,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:00,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:26:00,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:26:00,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 13:26:00,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:00,758 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:26:00,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:00,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:00,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:00,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:00,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:00,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:26:00,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:00,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:00,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:00,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:00,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:00,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:00,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141051277] [2020-10-29 13:26:00,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:26:00,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:26:00,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007575740] [2020-10-29 13:26:00,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:26:00,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:00,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:26:00,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:26:00,805 INFO L87 Difference]: Start difference. First operand 41966 states and 60910 transitions. Second operand 6 states. [2020-10-29 13:26:01,049 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:26:02,369 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:26:02,726 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:26:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:09,073 INFO L93 Difference]: Finished difference Result 94452 states and 136829 transitions. [2020-10-29 13:26:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:26:09,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-29 13:26:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:09,166 INFO L225 Difference]: With dead ends: 94452 [2020-10-29 13:26:09,166 INFO L226 Difference]: Without dead ends: 52529 [2020-10-29 13:26:09,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:26:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52529 states. [2020-10-29 13:26:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52529 to 49870. [2020-10-29 13:26:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49870 states. [2020-10-29 13:26:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49870 states to 49870 states and 72430 transitions. [2020-10-29 13:26:16,304 INFO L78 Accepts]: Start accepts. Automaton has 49870 states and 72430 transitions. Word has length 99 [2020-10-29 13:26:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:16,304 INFO L481 AbstractCegarLoop]: Abstraction has 49870 states and 72430 transitions. [2020-10-29 13:26:16,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:26:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 49870 states and 72430 transitions. [2020-10-29 13:26:16,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:26:16,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:16,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:16,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:26:16,316 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:16,316 INFO L82 PathProgramCache]: Analyzing trace with hash -10490877, now seen corresponding path program 1 times [2020-10-29 13:26:16,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:16,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333516369] [2020-10-29 13:26:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:16,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:16,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:16,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:17,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:17,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:17,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:17,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:18,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:18,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:18,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:21,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:21,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:26:21,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:26:21,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:26:21,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:21,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:26:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:26:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 13:26:21,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:21,586 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:26:21,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:21,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:21,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:21,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:21,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:21,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:26:21,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:21,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:21,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333516369] [2020-10-29 13:26:21,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:26:21,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:26:21,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842041761] [2020-10-29 13:26:21,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:26:21,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:21,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:26:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:26:21,618 INFO L87 Difference]: Start difference. First operand 49870 states and 72430 transitions. Second operand 6 states. [2020-10-29 13:26:21,879 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:26:23,297 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:26:23,620 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:26:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:31,322 INFO L93 Difference]: Finished difference Result 112252 states and 162629 transitions. [2020-10-29 13:26:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:26:31,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-29 13:26:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:31,415 INFO L225 Difference]: With dead ends: 112252 [2020-10-29 13:26:31,415 INFO L226 Difference]: Without dead ends: 62425 [2020-10-29 13:26:31,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:26:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62425 states. [2020-10-29 13:26:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62425 to 57774. [2020-10-29 13:26:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57774 states. [2020-10-29 13:26:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57774 states to 57774 states and 83950 transitions. [2020-10-29 13:26:39,846 INFO L78 Accepts]: Start accepts. Automaton has 57774 states and 83950 transitions. Word has length 99 [2020-10-29 13:26:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:39,847 INFO L481 AbstractCegarLoop]: Abstraction has 57774 states and 83950 transitions. [2020-10-29 13:26:39,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:26:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 57774 states and 83950 transitions. [2020-10-29 13:26:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-29 13:26:39,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:39,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:39,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:26:39,858 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1479684248, now seen corresponding path program 1 times [2020-10-29 13:26:39,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:39,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243817100] [2020-10-29 13:26:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:39,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:39,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:40,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:40,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:43,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:43,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:43,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:44,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:44,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-29 13:26:44,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:26:44,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:26:44,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:44,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:44,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:26:44,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:26:44,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 13:26:44,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:45,117 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:26:45,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:45,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:45,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:45,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:45,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:45,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:26:45,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:45,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:45,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:45,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:45,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:26:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:45,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243817100] [2020-10-29 13:26:45,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:26:45,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:26:45,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327873483] [2020-10-29 13:26:45,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:26:45,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:45,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:26:45,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:26:45,161 INFO L87 Difference]: Start difference. First operand 57774 states and 83950 transitions. Second operand 6 states. [2020-10-29 13:26:45,400 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:26:46,976 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:26:47,188 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:26:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:56,006 INFO L93 Difference]: Finished difference Result 110268 states and 159909 transitions. [2020-10-29 13:26:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:26:56,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2020-10-29 13:26:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:56,090 INFO L225 Difference]: With dead ends: 110268 [2020-10-29 13:26:56,090 INFO L226 Difference]: Without dead ends: 71065 [2020-10-29 13:26:56,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:26:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71065 states. [2020-10-29 13:27:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71065 to 63086. [2020-10-29 13:27:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63086 states. [2020-10-29 13:27:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63086 states to 63086 states and 91694 transitions. [2020-10-29 13:27:05,399 INFO L78 Accepts]: Start accepts. Automaton has 63086 states and 91694 transitions. Word has length 100 [2020-10-29 13:27:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:05,399 INFO L481 AbstractCegarLoop]: Abstraction has 63086 states and 91694 transitions. [2020-10-29 13:27:05,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:27:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 63086 states and 91694 transitions. [2020-10-29 13:27:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 13:27:05,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:05,410 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:05,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 13:27:05,411 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:05,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:05,411 INFO L82 PathProgramCache]: Analyzing trace with hash -857452058, now seen corresponding path program 1 times [2020-10-29 13:27:05,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:05,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836293439] [2020-10-29 13:27:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:05,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:06,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:06,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:10,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:10,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 13:27:10,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:27:10,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:27:10,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:10,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:27:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:27:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 13:27:10,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:10,866 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:27:10,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:10,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:10,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:10,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:10,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:10,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:27:10,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:10,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:10,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:10,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:10,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:10,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:10,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836293439] [2020-10-29 13:27:10,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:27:10,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:27:10,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170679026] [2020-10-29 13:27:10,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:27:10,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:27:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:27:10,921 INFO L87 Difference]: Start difference. First operand 63086 states and 91694 transitions. Second operand 9 states. [2020-10-29 13:27:11,187 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:27:16,814 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:27:17,133 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:27:17,587 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 165