/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:19:07,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:19:07,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:19:07,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:19:07,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:19:07,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:19:07,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:19:07,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:19:07,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:19:07,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:19:07,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:19:07,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:19:07,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:19:07,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:19:07,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:19:07,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:19:07,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:19:07,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:19:07,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:19:07,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:19:07,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:19:07,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:19:07,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:19:07,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:19:07,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:19:07,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:19:07,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:19:07,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:19:07,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:19:07,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:19:07,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:19:07,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:19:07,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:19:07,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:19:07,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:19:07,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:19:07,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:19:07,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:19:07,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:19:07,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:19:07,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:19:07,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:19:07,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:19:07,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:19:07,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:19:07,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:19:07,949 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:19:07,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:19:07,949 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:19:07,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:19:07,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:19:07,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:19:07,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:19:07,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:19:07,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:19:07,952 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:19:07,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:19:07,953 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:19:07,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:19:07,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:19:07,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:19:07,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:19:07,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:19:07,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:19:07,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:19:07,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:19:07,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:19:07,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:19:07,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:19:07,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:19:07,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:19:07,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:19:08,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:19:08,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:19:08,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:19:08,417 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:19:08,418 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:19:08,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:19:08,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92789633c/b0822303be12423196a87673ce7011e6/FLAGc1d707a44 [2020-10-27 05:19:09,185 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:19:09,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:19:09,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92789633c/b0822303be12423196a87673ce7011e6/FLAGc1d707a44 [2020-10-27 05:19:09,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92789633c/b0822303be12423196a87673ce7011e6 [2020-10-27 05:19:09,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:19:09,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:19:09,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:19:09,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:19:09,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:19:09,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:19:09" (1/1) ... [2020-10-27 05:19:09,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb114ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:09, skipping insertion in model container [2020-10-27 05:19:09,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:19:09" (1/1) ... [2020-10-27 05:19:09,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:19:09,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:19:09,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:19:09,927 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:19:10,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:19:10,107 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:19:10,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10 WrapperNode [2020-10-27 05:19:10,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:19:10,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:19:10,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:19:10,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:19:10,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10" (1/1) ... [2020-10-27 05:19:10,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10" (1/1) ... [2020-10-27 05:19:10,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10" (1/1) ... [2020-10-27 05:19:10,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10" (1/1) ... [2020-10-27 05:19:10,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10" (1/1) ... [2020-10-27 05:19:10,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10" (1/1) ... [2020-10-27 05:19:10,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10" (1/1) ... [2020-10-27 05:19:10,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:19:10,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:19:10,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:19:10,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:19:10,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:19:10,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:19:10,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:19:10,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:19:10,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:19:10,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:19:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:19:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:19:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:19:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:19:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:19:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:19:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:19:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:19:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:19:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:19:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:19:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:19:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:19:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:19:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:19:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:19:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:19:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:19:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:19:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:19:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:19:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:19:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:19:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:19:10,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:19:11,003 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:19:11,003 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:19:11,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:19:11 BoogieIcfgContainer [2020-10-27 05:19:11,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:19:11,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:19:11,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:19:11,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:19:11,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:19:09" (1/3) ... [2020-10-27 05:19:11,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e1631d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:19:11, skipping insertion in model container [2020-10-27 05:19:11,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:19:10" (2/3) ... [2020-10-27 05:19:11,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e1631d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:19:11, skipping insertion in model container [2020-10-27 05:19:11,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:19:11" (3/3) ... [2020-10-27 05:19:11,019 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:19:11,031 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:19:11,037 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:19:11,052 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:19:11,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:19:11,082 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:19:11,083 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:19:11,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:19:11,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:19:11,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:19:11,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:19:11,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:19:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2020-10-27 05:19:11,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:19:11,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:11,114 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] [2020-10-27 05:19:11,115 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash 453713683, now seen corresponding path program 1 times [2020-10-27 05:19:11,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:11,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739398390] [2020-10-27 05:19:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:11,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:11,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:11,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:13,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:16,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:16,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:19:16,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:19:16,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 05:19:16,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:19:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:19:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:19:16,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:19:16,916 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:19:16,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:16,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:16,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:16,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:16,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:16,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:19:16,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:19:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:19:16,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:16,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739398390] [2020-10-27 05:19:16,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:16,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:19:16,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102989850] [2020-10-27 05:19:16,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:19:17,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:19:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:19:17,019 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 8 states. [2020-10-27 05:19:17,349 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:19:18,507 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:19:18,896 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:19:19,206 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:19:19,510 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:19:19,856 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:19:20,118 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:19:20,375 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:19:20,643 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:19:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:20,788 INFO L93 Difference]: Finished difference Result 762 states and 1204 transitions. [2020-10-27 05:19:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:19:20,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 05:19:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:20,812 INFO L225 Difference]: With dead ends: 762 [2020-10-27 05:19:20,812 INFO L226 Difference]: Without dead ends: 668 [2020-10-27 05:19:20,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:19:20,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-10-27 05:19:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 161. [2020-10-27 05:19:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 05:19:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 232 transitions. [2020-10-27 05:19:20,905 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 232 transitions. Word has length 65 [2020-10-27 05:19:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:20,906 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 232 transitions. [2020-10-27 05:19:20,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:19:20,906 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 232 transitions. [2020-10-27 05:19:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:19:20,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:20,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:20,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:19:20,910 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:20,911 INFO L82 PathProgramCache]: Analyzing trace with hash -203917944, now seen corresponding path program 1 times [2020-10-27 05:19:20,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:20,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203802634] [2020-10-27 05:19:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:20,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:23,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:25,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:25,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:19:25,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:19:25,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:19:25,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:19:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:25,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:19:25,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:26,429 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:19:26,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:26,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:26,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:26,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:26,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:26,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:19:26,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:26,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:26,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:26,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:26,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:26,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203802634] [2020-10-27 05:19:26,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:26,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:19:26,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24924723] [2020-10-27 05:19:26,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:19:26,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:19:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:19:26,520 INFO L87 Difference]: Start difference. First operand 161 states and 232 transitions. Second operand 7 states. [2020-10-27 05:19:26,834 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:19:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:27,584 INFO L93 Difference]: Finished difference Result 478 states and 731 transitions. [2020-10-27 05:19:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:19:27,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-27 05:19:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:27,592 INFO L225 Difference]: With dead ends: 478 [2020-10-27 05:19:27,592 INFO L226 Difference]: Without dead ends: 355 [2020-10-27 05:19:27,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:19:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-27 05:19:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 220. [2020-10-27 05:19:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-27 05:19:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 324 transitions. [2020-10-27 05:19:27,656 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 324 transitions. Word has length 67 [2020-10-27 05:19:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:27,656 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 324 transitions. [2020-10-27 05:19:27,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:19:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 324 transitions. [2020-10-27 05:19:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:19:27,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:27,667 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] [2020-10-27 05:19:27,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:19:27,668 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:27,672 INFO L82 PathProgramCache]: Analyzing trace with hash 532183938, now seen corresponding path program 1 times [2020-10-27 05:19:27,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:27,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727631335] [2020-10-27 05:19:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:27,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:27,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:27,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:27,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:28,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:28,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:32,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:32,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:19:32,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:19:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:19:32,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:19:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:19:32,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:33,019 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:19:33,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:33,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:33,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:33,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:33,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:33,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:19:33,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:33,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:33,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727631335] [2020-10-27 05:19:33,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:33,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:19:33,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477966875] [2020-10-27 05:19:33,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:19:33,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:19:33,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:19:33,081 INFO L87 Difference]: Start difference. First operand 220 states and 324 transitions. Second operand 7 states. [2020-10-27 05:19:33,351 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:19:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:34,049 INFO L93 Difference]: Finished difference Result 473 states and 722 transitions. [2020-10-27 05:19:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:19:34,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-27 05:19:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:34,054 INFO L225 Difference]: With dead ends: 473 [2020-10-27 05:19:34,055 INFO L226 Difference]: Without dead ends: 350 [2020-10-27 05:19:34,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:19:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-27 05:19:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 240. [2020-10-27 05:19:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-27 05:19:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 354 transitions. [2020-10-27 05:19:34,092 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 354 transitions. Word has length 67 [2020-10-27 05:19:34,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:34,095 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 354 transitions. [2020-10-27 05:19:34,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:19:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 354 transitions. [2020-10-27 05:19:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:19:34,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:34,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:34,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:19:34,099 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash 302271320, now seen corresponding path program 1 times [2020-10-27 05:19:34,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:34,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427591297] [2020-10-27 05:19:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:34,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:34,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:34,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:34,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:34,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:35,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:35,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:36,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:36,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:19:36,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:19:36,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2547 [2020-10-27 05:19:36,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:36,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:36,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:19:36,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:19:36,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:36,987 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:19:36,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:37,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:37,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:37,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:37,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:19:37,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:37,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:19:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:19:37,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:37,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427591297] [2020-10-27 05:19:37,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:37,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:19:37,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783182010] [2020-10-27 05:19:37,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:19:37,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:37,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:19:37,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:19:37,038 INFO L87 Difference]: Start difference. First operand 240 states and 354 transitions. Second operand 4 states. [2020-10-27 05:19:37,308 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:19:37,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:37,826 INFO L93 Difference]: Finished difference Result 604 states and 921 transitions. [2020-10-27 05:19:37,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:19:37,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 05:19:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:37,830 INFO L225 Difference]: With dead ends: 604 [2020-10-27 05:19:37,830 INFO L226 Difference]: Without dead ends: 409 [2020-10-27 05:19:37,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:19:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-27 05:19:37,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 404. [2020-10-27 05:19:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-27 05:19:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 606 transitions. [2020-10-27 05:19:37,884 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 606 transitions. Word has length 67 [2020-10-27 05:19:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:37,886 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 606 transitions. [2020-10-27 05:19:37,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:19:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 606 transitions. [2020-10-27 05:19:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:19:37,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:37,888 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] [2020-10-27 05:19:37,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:19:37,889 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:37,889 INFO L82 PathProgramCache]: Analyzing trace with hash 923800953, now seen corresponding path program 1 times [2020-10-27 05:19:37,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:37,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192921880] [2020-10-27 05:19:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:37,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:37,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:37,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:38,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:38,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:40,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:40,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:19:40,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:19:40,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2563 [2020-10-27 05:19:40,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:40,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:19:40,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:19:40,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:19:40,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:40,938 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:19:40,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:40,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:40,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:40,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:40,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:40,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:19:40,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:40,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:19:40,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:40,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:19:40,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:40,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192921880] [2020-10-27 05:19:40,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:40,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:19:40,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74415087] [2020-10-27 05:19:40,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:19:40,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:40,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:19:40,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:19:40,988 INFO L87 Difference]: Start difference. First operand 404 states and 606 transitions. Second operand 8 states. [2020-10-27 05:19:41,400 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:19:42,267 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:19:42,523 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:19:42,882 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:19:43,144 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:19:43,399 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:19:43,918 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:19:44,259 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:19:44,600 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:19:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:44,639 INFO L93 Difference]: Finished difference Result 1514 states and 2326 transitions. [2020-10-27 05:19:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:19:44,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-27 05:19:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:44,647 INFO L225 Difference]: With dead ends: 1514 [2020-10-27 05:19:44,647 INFO L226 Difference]: Without dead ends: 1284 [2020-10-27 05:19:44,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:19:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2020-10-27 05:19:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 404. [2020-10-27 05:19:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-27 05:19:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 604 transitions. [2020-10-27 05:19:44,703 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 604 transitions. Word has length 67 [2020-10-27 05:19:44,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:44,704 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 604 transitions. [2020-10-27 05:19:44,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:19:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 604 transitions. [2020-10-27 05:19:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:19:44,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:44,705 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] [2020-10-27 05:19:44,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:19:44,706 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:44,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1132681230, now seen corresponding path program 1 times [2020-10-27 05:19:44,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:44,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430650429] [2020-10-27 05:19:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:44,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:44,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:44,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:44,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:44,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:45,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:49,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:19:49,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:19:49,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:19:49,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:49,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:19:49,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:49,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:19:49,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:50,095 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:19:50,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:50,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:50,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:50,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:50,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:50,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:19:50,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:50,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:50,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:50,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:50,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:50,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430650429] [2020-10-27 05:19:50,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:50,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:19:50,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932965143] [2020-10-27 05:19:50,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:19:50,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:50,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:19:50,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:19:50,168 INFO L87 Difference]: Start difference. First operand 404 states and 604 transitions. Second operand 7 states. [2020-10-27 05:19:50,436 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:19:51,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:51,306 INFO L93 Difference]: Finished difference Result 970 states and 1475 transitions. [2020-10-27 05:19:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:19:51,307 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-27 05:19:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:51,314 INFO L225 Difference]: With dead ends: 970 [2020-10-27 05:19:51,314 INFO L226 Difference]: Without dead ends: 676 [2020-10-27 05:19:51,315 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 [2020-10-27 05:19:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-10-27 05:19:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 396. [2020-10-27 05:19:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-27 05:19:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 584 transitions. [2020-10-27 05:19:51,373 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 584 transitions. Word has length 67 [2020-10-27 05:19:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:51,373 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 584 transitions. [2020-10-27 05:19:51,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:19:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 584 transitions. [2020-10-27 05:19:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:19:51,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:51,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:51,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:19:51,375 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1979130644, now seen corresponding path program 1 times [2020-10-27 05:19:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:51,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309729178] [2020-10-27 05:19:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:51,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:51,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:51,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:51,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:51,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:51,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:52,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:56,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:56,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:19:56,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:19:56,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4716 [2020-10-27 05:19:56,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:19:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:19:56,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:19:56,462 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:19:56,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:56,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:56,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:56,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:56,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:56,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:19:56,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:56,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:56,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:56,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:56,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:56,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309729178] [2020-10-27 05:19:56,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:56,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:19:56,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733435588] [2020-10-27 05:19:56,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:19:56,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:19:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:19:56,534 INFO L87 Difference]: Start difference. First operand 396 states and 584 transitions. Second operand 7 states. [2020-10-27 05:19:56,879 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:19:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:57,682 INFO L93 Difference]: Finished difference Result 1012 states and 1532 transitions. [2020-10-27 05:19:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:19:57,683 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-27 05:19:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:57,687 INFO L225 Difference]: With dead ends: 1012 [2020-10-27 05:19:57,687 INFO L226 Difference]: Without dead ends: 688 [2020-10-27 05:19:57,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:19:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-10-27 05:19:57,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 368. [2020-10-27 05:19:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-27 05:19:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 538 transitions. [2020-10-27 05:19:57,741 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 538 transitions. Word has length 67 [2020-10-27 05:19:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:57,741 INFO L481 AbstractCegarLoop]: Abstraction has 368 states and 538 transitions. [2020-10-27 05:19:57,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:19:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 538 transitions. [2020-10-27 05:19:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:19:57,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:57,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:57,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:19:57,743 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1266558041, now seen corresponding path program 1 times [2020-10-27 05:19:57,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:57,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461799699] [2020-10-27 05:19:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:57,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:57,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:58,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:58,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:00,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:02,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:02,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:20:02,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:20:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:20:02,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:20:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:02,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:20:02,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:20:03,138 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:03,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:03,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:03,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:03,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:03,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:03,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:20:03,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:03,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:03,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461799699] [2020-10-27 05:20:03,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:03,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:20:03,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050557519] [2020-10-27 05:20:03,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:20:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:03,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:20:03,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:20:03,206 INFO L87 Difference]: Start difference. First operand 368 states and 538 transitions. Second operand 7 states. [2020-10-27 05:20:03,466 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:20:04,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:04,177 INFO L93 Difference]: Finished difference Result 710 states and 1069 transitions. [2020-10-27 05:20:04,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:20:04,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-27 05:20:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:04,180 INFO L225 Difference]: With dead ends: 710 [2020-10-27 05:20:04,181 INFO L226 Difference]: Without dead ends: 525 [2020-10-27 05:20:04,182 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 [2020-10-27 05:20:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-27 05:20:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 336. [2020-10-27 05:20:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-27 05:20:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 491 transitions. [2020-10-27 05:20:04,234 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 491 transitions. Word has length 68 [2020-10-27 05:20:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:04,235 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 491 transitions. [2020-10-27 05:20:04,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:20:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 491 transitions. [2020-10-27 05:20:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:20:04,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:04,236 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] [2020-10-27 05:20:04,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:20:04,236 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2144055195, now seen corresponding path program 1 times [2020-10-27 05:20:04,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:04,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917816332] [2020-10-27 05:20:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:04,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:04,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:04,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:04,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:04,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:05,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:05,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:08,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:08,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:20:08,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:20:08,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4494 [2020-10-27 05:20:08,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:08,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:20:08,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:20:08,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:20:08,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:09,058 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:09,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:09,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:09,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:09,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:09,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:09,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:20:09,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:09,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:09,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917816332] [2020-10-27 05:20:09,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:09,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:09,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264566457] [2020-10-27 05:20:09,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:20:09,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:20:09,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:20:09,113 INFO L87 Difference]: Start difference. First operand 336 states and 491 transitions. Second operand 5 states. [2020-10-27 05:20:09,472 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:10,330 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:20:10,634 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:20:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:10,904 INFO L93 Difference]: Finished difference Result 584 states and 876 transitions. [2020-10-27 05:20:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:20:10,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 05:20:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:10,908 INFO L225 Difference]: With dead ends: 584 [2020-10-27 05:20:10,908 INFO L226 Difference]: Without dead ends: 461 [2020-10-27 05:20:10,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:20:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-27 05:20:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2020-10-27 05:20:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-27 05:20:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 672 transitions. [2020-10-27 05:20:10,977 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 672 transitions. Word has length 68 [2020-10-27 05:20:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:10,977 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 672 transitions. [2020-10-27 05:20:10,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:20:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 672 transitions. [2020-10-27 05:20:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:20:10,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:10,979 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] [2020-10-27 05:20:10,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:20:10,979 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1486310900, now seen corresponding path program 1 times [2020-10-27 05:20:10,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:10,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135996176] [2020-10-27 05:20:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:11,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:11,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:11,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:11,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:12,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:12,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:20:12,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:20:12,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-27 05:20:12,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:12,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:12,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:20:12,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 05:20:12,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:12,825 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:12,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:12,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:12,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:12,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:12,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:12,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:20:12,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:12,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:12,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:12,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:12,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:12,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135996176] [2020-10-27 05:20:12,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:12,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:20:12,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020792943] [2020-10-27 05:20:12,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:20:12,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:20:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:20:12,861 INFO L87 Difference]: Start difference. First operand 453 states and 672 transitions. Second operand 4 states. [2020-10-27 05:20:13,142 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:20:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:13,785 INFO L93 Difference]: Finished difference Result 1141 states and 1732 transitions. [2020-10-27 05:20:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:20:13,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-27 05:20:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:13,794 INFO L225 Difference]: With dead ends: 1141 [2020-10-27 05:20:13,794 INFO L226 Difference]: Without dead ends: 748 [2020-10-27 05:20:13,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:20:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-27 05:20:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 745. [2020-10-27 05:20:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2020-10-27 05:20:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1119 transitions. [2020-10-27 05:20:13,909 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1119 transitions. Word has length 68 [2020-10-27 05:20:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:13,909 INFO L481 AbstractCegarLoop]: Abstraction has 745 states and 1119 transitions. [2020-10-27 05:20:13,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:20:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1119 transitions. [2020-10-27 05:20:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:20:13,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:13,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:13,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:20:13,911 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:13,911 INFO L82 PathProgramCache]: Analyzing trace with hash 599543483, now seen corresponding path program 1 times [2020-10-27 05:20:13,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:13,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40833562] [2020-10-27 05:20:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:13,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:13,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:13,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:13,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:14,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:15,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:15,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:20:15,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:20:15,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1802 [2020-10-27 05:20:15,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:15,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:20:15,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:15,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:20:15,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:16,005 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:16,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:16,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:16,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:16,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:16,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:16,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:20:16,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:16,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:16,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:16,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:16,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:16,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40833562] [2020-10-27 05:20:16,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:16,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687053399] [2020-10-27 05:20:16,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:20:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:20:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:20:16,064 INFO L87 Difference]: Start difference. First operand 745 states and 1119 transitions. Second operand 6 states. [2020-10-27 05:20:16,349 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:17,135 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:20:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:17,234 INFO L93 Difference]: Finished difference Result 2071 states and 3155 transitions. [2020-10-27 05:20:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:20:17,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-27 05:20:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:17,242 INFO L225 Difference]: With dead ends: 2071 [2020-10-27 05:20:17,242 INFO L226 Difference]: Without dead ends: 1382 [2020-10-27 05:20:17,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:20:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2020-10-27 05:20:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1379. [2020-10-27 05:20:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1379 states. [2020-10-27 05:20:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 2089 transitions. [2020-10-27 05:20:17,438 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 2089 transitions. Word has length 69 [2020-10-27 05:20:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:17,439 INFO L481 AbstractCegarLoop]: Abstraction has 1379 states and 2089 transitions. [2020-10-27 05:20:17,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:20:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 2089 transitions. [2020-10-27 05:20:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:20:17,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:17,440 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] [2020-10-27 05:20:17,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:20:17,440 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:17,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1837001824, now seen corresponding path program 1 times [2020-10-27 05:20:17,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:17,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711198009] [2020-10-27 05:20:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:17,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:17,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:17,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:17,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:18,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:18,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:20:18,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:20:18,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-27 05:20:18,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:20:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:20:18,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:18,336 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:18,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:18,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:18,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:18,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:18,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:18,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:20:18,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:18,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:18,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:18,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:18,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711198009] [2020-10-27 05:20:18,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:18,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:20:18,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215138605] [2020-10-27 05:20:18,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:20:18,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:18,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:20:18,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:20:18,362 INFO L87 Difference]: Start difference. First operand 1379 states and 2089 transitions. Second operand 4 states. [2020-10-27 05:20:18,619 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:20:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:19,439 INFO L93 Difference]: Finished difference Result 3767 states and 5743 transitions. [2020-10-27 05:20:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:20:19,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 05:20:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:19,454 INFO L225 Difference]: With dead ends: 3767 [2020-10-27 05:20:19,454 INFO L226 Difference]: Without dead ends: 2460 [2020-10-27 05:20:19,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:20:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2020-10-27 05:20:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2457. [2020-10-27 05:20:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2457 states. [2020-10-27 05:20:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3709 transitions. [2020-10-27 05:20:19,872 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3709 transitions. Word has length 69 [2020-10-27 05:20:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:19,872 INFO L481 AbstractCegarLoop]: Abstraction has 2457 states and 3709 transitions. [2020-10-27 05:20:19,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:20:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3709 transitions. [2020-10-27 05:20:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:20:19,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:19,873 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] [2020-10-27 05:20:19,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:20:19,873 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1404406056, now seen corresponding path program 1 times [2020-10-27 05:20:19,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:19,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776567402] [2020-10-27 05:20:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:19,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:19,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:19,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:20,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:21,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:21,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:20:21,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:20:21,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1367 [2020-10-27 05:20:21,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:21,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:20:21,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:21,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:20:21,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:21,571 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:21,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:21,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:21,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:21,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:21,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:21,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:20:21,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:21,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:21,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:21,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:21,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:21,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776567402] [2020-10-27 05:20:21,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:21,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:21,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024806875] [2020-10-27 05:20:21,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:20:21,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:20:21,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:20:21,630 INFO L87 Difference]: Start difference. First operand 2457 states and 3709 transitions. Second operand 6 states. [2020-10-27 05:20:21,910 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:20:22,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:22,619 INFO L93 Difference]: Finished difference Result 4846 states and 7341 transitions. [2020-10-27 05:20:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:20:22,620 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-27 05:20:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:22,633 INFO L225 Difference]: With dead ends: 4846 [2020-10-27 05:20:22,633 INFO L226 Difference]: Without dead ends: 2457 [2020-10-27 05:20:22,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:20:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2020-10-27 05:20:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2457. [2020-10-27 05:20:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2457 states. [2020-10-27 05:20:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3683 transitions. [2020-10-27 05:20:23,089 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3683 transitions. Word has length 70 [2020-10-27 05:20:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:23,089 INFO L481 AbstractCegarLoop]: Abstraction has 2457 states and 3683 transitions. [2020-10-27 05:20:23,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:20:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3683 transitions. [2020-10-27 05:20:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:20:23,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:23,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:23,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:20:23,091 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1916598131, now seen corresponding path program 1 times [2020-10-27 05:20:23,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:23,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884255343] [2020-10-27 05:20:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:23,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:23,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:23,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:23,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:23,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:20:23,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:20:23,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-27 05:20:23,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:23,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:23,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 05:20:23,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:20:23,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:23,828 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:23,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:23,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:23,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:23,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:23,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:23,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:20:23,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:23,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:23,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884255343] [2020-10-27 05:20:23,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:23,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:20:23,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114252539] [2020-10-27 05:20:23,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:20:23,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:20:23,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:20:23,863 INFO L87 Difference]: Start difference. First operand 2457 states and 3683 transitions. Second operand 4 states. [2020-10-27 05:20:24,128 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:20:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:25,183 INFO L93 Difference]: Finished difference Result 6801 states and 10207 transitions. [2020-10-27 05:20:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:20:25,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 05:20:25,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:25,204 INFO L225 Difference]: With dead ends: 6801 [2020-10-27 05:20:25,204 INFO L226 Difference]: Without dead ends: 4428 [2020-10-27 05:20:25,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:20:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2020-10-27 05:20:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4425. [2020-10-27 05:20:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4425 states. [2020-10-27 05:20:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 6569 transitions. [2020-10-27 05:20:25,975 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 6569 transitions. Word has length 70 [2020-10-27 05:20:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:25,975 INFO L481 AbstractCegarLoop]: Abstraction has 4425 states and 6569 transitions. [2020-10-27 05:20:25,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:20:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 6569 transitions. [2020-10-27 05:20:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:20:25,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:25,976 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] [2020-10-27 05:20:25,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:20:25,977 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:25,977 INFO L82 PathProgramCache]: Analyzing trace with hash 79114573, now seen corresponding path program 1 times [2020-10-27 05:20:25,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:25,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385150119] [2020-10-27 05:20:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:26,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:26,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:26,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:26,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:20:26,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:20:26,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 05:20:26,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:26,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:26,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 05:20:26,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:20:26,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:26,462 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:26,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:26,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:26,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:26,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:26,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:26,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:20:26,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:26,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:26,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:26,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:26,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:26,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385150119] [2020-10-27 05:20:26,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:26,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:20:26,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494988978] [2020-10-27 05:20:26,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:20:26,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:26,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:20:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:20:26,498 INFO L87 Difference]: Start difference. First operand 4425 states and 6569 transitions. Second operand 4 states. [2020-10-27 05:20:26,781 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:20:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:28,193 INFO L93 Difference]: Finished difference Result 12319 states and 18237 transitions. [2020-10-27 05:20:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:20:28,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-27 05:20:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:28,231 INFO L225 Difference]: With dead ends: 12319 [2020-10-27 05:20:28,232 INFO L226 Difference]: Without dead ends: 7982 [2020-10-27 05:20:28,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:20:28,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7982 states. [2020-10-27 05:20:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7982 to 7934. [2020-10-27 05:20:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7934 states. [2020-10-27 05:20:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 11614 transitions. [2020-10-27 05:20:29,369 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 11614 transitions. Word has length 71 [2020-10-27 05:20:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:29,369 INFO L481 AbstractCegarLoop]: Abstraction has 7934 states and 11614 transitions. [2020-10-27 05:20:29,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:20:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 11614 transitions. [2020-10-27 05:20:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:20:29,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:29,370 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] [2020-10-27 05:20:29,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:20:29,371 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:29,371 INFO L82 PathProgramCache]: Analyzing trace with hash 951964737, now seen corresponding path program 1 times [2020-10-27 05:20:29,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:29,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57194308] [2020-10-27 05:20:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:29,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:29,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:29,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:29,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:20:29,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:20:29,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-27 05:20:29,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:29,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:20:29,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:29,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:20:29,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:30,011 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:30,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:30,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:30,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:30,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:30,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:30,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:20:30,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:30,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57194308] [2020-10-27 05:20:30,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:30,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:30,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944275431] [2020-10-27 05:20:30,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:20:30,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:30,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:20:30,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:20:30,051 INFO L87 Difference]: Start difference. First operand 7934 states and 11614 transitions. Second operand 6 states. [2020-10-27 05:20:30,339 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:31,306 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:20:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:32,808 INFO L93 Difference]: Finished difference Result 23620 states and 34562 transitions. [2020-10-27 05:20:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:20:32,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-27 05:20:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:32,849 INFO L225 Difference]: With dead ends: 23620 [2020-10-27 05:20:32,849 INFO L226 Difference]: Without dead ends: 15729 [2020-10-27 05:20:32,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:20:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15729 states. [2020-10-27 05:20:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15729 to 15726. [2020-10-27 05:20:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15726 states. [2020-10-27 05:20:35,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15726 states to 15726 states and 22894 transitions. [2020-10-27 05:20:35,083 INFO L78 Accepts]: Start accepts. Automaton has 15726 states and 22894 transitions. Word has length 72 [2020-10-27 05:20:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:35,083 INFO L481 AbstractCegarLoop]: Abstraction has 15726 states and 22894 transitions. [2020-10-27 05:20:35,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:20:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 15726 states and 22894 transitions. [2020-10-27 05:20:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:20:35,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:35,084 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] [2020-10-27 05:20:35,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:20:35,084 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1723828390, now seen corresponding path program 1 times [2020-10-27 05:20:35,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:35,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370772913] [2020-10-27 05:20:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:35,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:35,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:35,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:20:35,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:35,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 05:20:35,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:35,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:20:35,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 05:20:35,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:20:35,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:35,507 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:35,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:35,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:35,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:35,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:35,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:35,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:20:35,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:35,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:35,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:35,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:35,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:35,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370772913] [2020-10-27 05:20:35,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:35,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:35,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608373951] [2020-10-27 05:20:35,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:20:35,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:35,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:20:35,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:20:35,533 INFO L87 Difference]: Start difference. First operand 15726 states and 22894 transitions. Second operand 5 states. [2020-10-27 05:20:39,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:39,304 INFO L93 Difference]: Finished difference Result 24920 states and 36199 transitions. [2020-10-27 05:20:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:20:39,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-27 05:20:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:39,374 INFO L225 Difference]: With dead ends: 24920 [2020-10-27 05:20:39,374 INFO L226 Difference]: Without dead ends: 24917 [2020-10-27 05:20:39,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:20:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24917 states. [2020-10-27 05:20:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24917 to 15982. [2020-10-27 05:20:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15982 states. [2020-10-27 05:20:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15982 states to 15982 states and 23022 transitions. [2020-10-27 05:20:41,945 INFO L78 Accepts]: Start accepts. Automaton has 15982 states and 23022 transitions. Word has length 72 [2020-10-27 05:20:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:41,946 INFO L481 AbstractCegarLoop]: Abstraction has 15982 states and 23022 transitions. [2020-10-27 05:20:41,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:20:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 15982 states and 23022 transitions. [2020-10-27 05:20:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:20:41,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:41,953 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] [2020-10-27 05:20:41,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:20:41,953 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:41,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2101427831, now seen corresponding path program 1 times [2020-10-27 05:20:41,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:41,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738608421] [2020-10-27 05:20:41,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:41,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:42,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:42,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:42,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:43,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:43,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:43,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:43,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:46,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:46,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:20:46,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:20:46,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:20:46,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:20:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:20:46,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:47,453 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:20:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:47,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:47,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:47,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:47,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:47,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:20:47,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:47,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:47,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:47,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:47,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:47,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738608421] [2020-10-27 05:20:47,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:20:47,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:20:47,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584645498] [2020-10-27 05:20:47,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:20:47,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:47,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:20:47,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:20:47,528 INFO L87 Difference]: Start difference. First operand 15982 states and 23022 transitions. Second operand 11 states. [2020-10-27 05:20:47,895 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:20:51,330 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:51,720 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:20:52,020 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:20:56,690 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:21:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:01,779 INFO L93 Difference]: Finished difference Result 84594 states and 120830 transitions. [2020-10-27 05:21:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:21:01,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2020-10-27 05:21:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:01,941 INFO L225 Difference]: With dead ends: 84594 [2020-10-27 05:21:01,941 INFO L226 Difference]: Without dead ends: 68655 [2020-10-27 05:21:01,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=447, Invalid=1533, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 05:21:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68655 states. [2020-10-27 05:21:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68655 to 27010. [2020-10-27 05:21:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27010 states. [2020-10-27 05:21:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27010 states to 27010 states and 38738 transitions. [2020-10-27 05:21:06,969 INFO L78 Accepts]: Start accepts. Automaton has 27010 states and 38738 transitions. Word has length 99 [2020-10-27 05:21:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:06,969 INFO L481 AbstractCegarLoop]: Abstraction has 27010 states and 38738 transitions. [2020-10-27 05:21:06,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:21:06,970 INFO L276 IsEmpty]: Start isEmpty. Operand 27010 states and 38738 transitions. [2020-10-27 05:21:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:21:06,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:06,976 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] [2020-10-27 05:21:06,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:21:06,976 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:06,976 INFO L82 PathProgramCache]: Analyzing trace with hash -856940291, now seen corresponding path program 1 times [2020-10-27 05:21:06,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:06,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251848677] [2020-10-27 05:21:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:07,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:07,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:07,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:07,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:07,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:08,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:08,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:09,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:09,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:09,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:10,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:11,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:12,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:12,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:21:12,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:21:12,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:21:12,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:12,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:21:12,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:12,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:21:12,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:12,428 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:21:12,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:12,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:12,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:12,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:12,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:12,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:21:12,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:12,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:12,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:12,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:12,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:12,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251848677] [2020-10-27 05:21:12,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:21:12,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:21:12,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808169570] [2020-10-27 05:21:12,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:21:12,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:12,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:21:12,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:21:12,506 INFO L87 Difference]: Start difference. First operand 27010 states and 38738 transitions. Second operand 11 states. [2020-10-27 05:21:12,857 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:21:13,998 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-10-27 05:21:16,901 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:21:17,320 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:21:17,852 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:21:32,598 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:21:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:49,388 INFO L93 Difference]: Finished difference Result 224430 states and 318362 transitions. [2020-10-27 05:21:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:21:49,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2020-10-27 05:21:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:49,990 INFO L225 Difference]: With dead ends: 224430 [2020-10-27 05:21:49,990 INFO L226 Difference]: Without dead ends: 197463 [2020-10-27 05:21:50,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:21:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197463 states. [2020-10-27 05:22:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197463 to 63614. [2020-10-27 05:22:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63614 states. [2020-10-27 05:22:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63614 states to 63614 states and 89230 transitions. [2020-10-27 05:22:02,656 INFO L78 Accepts]: Start accepts. Automaton has 63614 states and 89230 transitions. Word has length 99 [2020-10-27 05:22:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:02,656 INFO L481 AbstractCegarLoop]: Abstraction has 63614 states and 89230 transitions. [2020-10-27 05:22:02,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:22:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 63614 states and 89230 transitions. [2020-10-27 05:22:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 05:22:02,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:02,671 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] [2020-10-27 05:22:02,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:22:02,672 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:02,672 INFO L82 PathProgramCache]: Analyzing trace with hash 364687882, now seen corresponding path program 1 times [2020-10-27 05:22:02,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:02,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339512448] [2020-10-27 05:22:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:02,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:02,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:03,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:03,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:05,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:07,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:07,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 05:22:07,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:22:07,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:22:07,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:07,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:22:07,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:07,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 05:22:07,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:08,308 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:08,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:08,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:08,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:08,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:08,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:08,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:22:08,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:08,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:08,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:08,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339512448] [2020-10-27 05:22:08,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:22:08,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 05:22:08,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392285423] [2020-10-27 05:22:08,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:22:08,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:08,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:22:08,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:22:08,363 INFO L87 Difference]: Start difference. First operand 63614 states and 89230 transitions. Second operand 13 states. [2020-10-27 05:22:09,055 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2020-10-27 05:22:15,797 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 174 [2020-10-27 05:22:16,472 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 169 [2020-10-27 05:22:16,892 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 163