/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:18:07,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:18:07,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:18:07,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:18:07,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:18:07,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:18:07,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:18:07,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:18:07,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:18:07,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:18:07,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:18:07,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:18:07,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:18:07,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:18:07,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:18:07,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:18:07,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:18:07,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:18:07,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:18:07,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:18:07,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:18:07,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:18:07,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:18:07,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:18:08,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:18:08,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:18:08,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:18:08,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:18:08,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:18:08,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:18:08,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:18:08,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:18:08,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:18:08,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:18:08,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:18:08,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:18:08,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:18:08,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:18:08,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:18:08,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:18:08,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:18:08,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:18:08,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:18:08,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:18:08,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:18:08,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:18:08,069 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:18:08,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:18:08,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:18:08,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:18:08,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:18:08,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:18:08,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:18:08,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:18:08,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:18:08,071 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:18:08,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:18:08,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:18:08,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:18:08,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:18:08,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:18:08,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:18:08,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:18:08,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:18:08,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:18:08,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:18:08,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:18:08,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:18:08,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:18:08,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:18:08,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:18:08,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:18:08,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:18:08,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:18:08,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:18:08,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:18:08,461 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:18:08,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-29 13:18:08,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf606617d/11faf195372842acb877f3e64f433426/FLAG067866def [2020-10-29 13:18:09,307 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:18:09,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-29 13:18:09,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf606617d/11faf195372842acb877f3e64f433426/FLAG067866def [2020-10-29 13:18:09,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf606617d/11faf195372842acb877f3e64f433426 [2020-10-29 13:18:09,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:18:09,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:18:09,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:09,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:18:09,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:18:09,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:09" (1/1) ... [2020-10-29 13:18:09,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab36c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:09, skipping insertion in model container [2020-10-29 13:18:09,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:09" (1/1) ... [2020-10-29 13:18:09,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:18:09,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:18:09,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:09,936 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:18:09,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:10,029 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:18:10,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10 WrapperNode [2020-10-29 13:18:10,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:10,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:18:10,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:18:10,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:18:10,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10" (1/1) ... [2020-10-29 13:18:10,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10" (1/1) ... [2020-10-29 13:18:10,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10" (1/1) ... [2020-10-29 13:18:10,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10" (1/1) ... [2020-10-29 13:18:10,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10" (1/1) ... [2020-10-29 13:18:10,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10" (1/1) ... [2020-10-29 13:18:10,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10" (1/1) ... [2020-10-29 13:18:10,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:18:10,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:18:10,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:18:10,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:18:10,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10" (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 [2020-10-29 13:18:10,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:18:10,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:18:10,190 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:18:10,190 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:18:10,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:18:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:18:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:18:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:18:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:18:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:18:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:18:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:18:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:18:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:18:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:18:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:18:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:18:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:18:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:18:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:18:10,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:18:10,920 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:18:10,921 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:18:10,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:10 BoogieIcfgContainer [2020-10-29 13:18:10,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:18:10,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:18:10,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:18:10,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:18:10,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:18:09" (1/3) ... [2020-10-29 13:18:10,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46639906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:10, skipping insertion in model container [2020-10-29 13:18:10,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:10" (2/3) ... [2020-10-29 13:18:10,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46639906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:10, skipping insertion in model container [2020-10-29 13:18:10,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:10" (3/3) ... [2020-10-29 13:18:10,941 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-29 13:18:10,955 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:18:10,962 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:18:10,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:18:11,025 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:18:11,025 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:18:11,025 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:18:11,025 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:18:11,026 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:18:11,026 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:18:11,026 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:18:11,026 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:18:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-10-29 13:18:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:18:11,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:11,072 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] [2020-10-29 13:18:11,073 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash -533712479, now seen corresponding path program 1 times [2020-10-29 13:18:11,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:11,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258930598] [2020-10-29 13:18:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:11,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:11,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:11,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:12,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:12,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:16,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:16,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:18:16,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:18:16,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:18:16,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:16,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:18:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:18:16,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:18:16,832 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:16,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:16,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:16,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:16,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:16,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:16,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:18:16,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:16,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:16,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:16,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258930598] [2020-10-29 13:18:16,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:16,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:18:16,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815007568] [2020-10-29 13:18:16,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:16,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:16,905 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 7 states. [2020-10-29 13:18:17,180 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:18:17,967 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:18:18,238 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:18,495 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:18:18,774 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:19,015 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:18:19,233 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:18:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:19,316 INFO L93 Difference]: Finished difference Result 528 states and 830 transitions. [2020-10-29 13:18:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:18:19,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-29 13:18:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:19,337 INFO L225 Difference]: With dead ends: 528 [2020-10-29 13:18:19,337 INFO L226 Difference]: Without dead ends: 438 [2020-10-29 13:18:19,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:18:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-29 13:18:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 129. [2020-10-29 13:18:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 13:18:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 186 transitions. [2020-10-29 13:18:19,457 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 186 transitions. Word has length 52 [2020-10-29 13:18:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:19,458 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 186 transitions. [2020-10-29 13:18:19,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 186 transitions. [2020-10-29 13:18:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:18:19,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:19,462 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] [2020-10-29 13:18:19,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:18:19,464 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:19,467 INFO L82 PathProgramCache]: Analyzing trace with hash 68530966, now seen corresponding path program 1 times [2020-10-29 13:18:19,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:19,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371610144] [2020-10-29 13:18:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:19,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:19,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:19,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:20,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:20,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:24,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:24,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:18:24,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:18:24,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:18:24,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:24,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:18:24,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:18:24,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:24,789 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:24,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:24,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:24,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:24,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:24,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:24,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:18:24,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:24,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:24,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:24,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:24,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:24,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:24,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371610144] [2020-10-29 13:18:24,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:24,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:18:24,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818247110] [2020-10-29 13:18:24,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:24,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:24,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:24,854 INFO L87 Difference]: Start difference. First operand 129 states and 186 transitions. Second operand 7 states. [2020-10-29 13:18:25,123 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:18:25,819 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:18:26,054 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:18:26,323 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:18:26,559 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:18:26,768 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:18:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:26,949 INFO L93 Difference]: Finished difference Result 708 states and 1092 transitions. [2020-10-29 13:18:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:18:26,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-29 13:18:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:26,961 INFO L225 Difference]: With dead ends: 708 [2020-10-29 13:18:26,961 INFO L226 Difference]: Without dead ends: 609 [2020-10-29 13:18:26,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:18:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-10-29 13:18:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 269. [2020-10-29 13:18:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-29 13:18:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 408 transitions. [2020-10-29 13:18:27,043 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 408 transitions. Word has length 54 [2020-10-29 13:18:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:27,043 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 408 transitions. [2020-10-29 13:18:27,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 408 transitions. [2020-10-29 13:18:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:18:27,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:27,045 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] [2020-10-29 13:18:27,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:18:27,046 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:27,049 INFO L82 PathProgramCache]: Analyzing trace with hash 804632848, now seen corresponding path program 1 times [2020-10-29 13:18:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:27,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048768324] [2020-10-29 13:18:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:27,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:27,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:32,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:32,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:18:32,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:18:32,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:18:32,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:32,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:32,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:32,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:32,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:18:32,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:32,339 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:32,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:32,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:32,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:32,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:32,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:32,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:18:32,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:32,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:32,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:32,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:32,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:32,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:32,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048768324] [2020-10-29 13:18:32,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:32,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:18:32,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316906664] [2020-10-29 13:18:32,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:32,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:32,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:32,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:32,399 INFO L87 Difference]: Start difference. First operand 269 states and 408 transitions. Second operand 7 states. [2020-10-29 13:18:32,651 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:18:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:33,374 INFO L93 Difference]: Finished difference Result 789 states and 1225 transitions. [2020-10-29 13:18:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:18:33,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-29 13:18:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:33,384 INFO L225 Difference]: With dead ends: 789 [2020-10-29 13:18:33,385 INFO L226 Difference]: Without dead ends: 550 [2020-10-29 13:18:33,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:18:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-10-29 13:18:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 336. [2020-10-29 13:18:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-29 13:18:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 511 transitions. [2020-10-29 13:18:33,434 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 511 transitions. Word has length 54 [2020-10-29 13:18:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:33,434 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 511 transitions. [2020-10-29 13:18:33,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 511 transitions. [2020-10-29 13:18:33,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:18:33,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:33,437 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] [2020-10-29 13:18:33,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:18:33,437 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:33,438 INFO L82 PathProgramCache]: Analyzing trace with hash 574720230, now seen corresponding path program 1 times [2020-10-29 13:18:33,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:33,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78590112] [2020-10-29 13:18:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:33,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:33,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:33,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:33,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:33,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:33,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:34,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:35,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:35,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:18:35,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:18:35,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2324 [2020-10-29 13:18:35,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:35,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:18:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:18:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:18:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:36,078 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:36,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:36,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:36,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:36,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:36,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:36,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:18:36,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:36,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:36,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:36,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:36,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:36,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78590112] [2020-10-29 13:18:36,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:36,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:18:36,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704013181] [2020-10-29 13:18:36,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:18:36,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:36,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:18:36,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:18:36,127 INFO L87 Difference]: Start difference. First operand 336 states and 511 transitions. Second operand 5 states. [2020-10-29 13:18:36,368 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:18:37,065 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:18:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:37,166 INFO L93 Difference]: Finished difference Result 1068 states and 1661 transitions. [2020-10-29 13:18:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:18:37,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-10-29 13:18:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:37,172 INFO L225 Difference]: With dead ends: 1068 [2020-10-29 13:18:37,172 INFO L226 Difference]: Without dead ends: 829 [2020-10-29 13:18:37,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2020-10-29 13:18:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 823. [2020-10-29 13:18:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 823 states. [2020-10-29 13:18:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1267 transitions. [2020-10-29 13:18:37,254 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1267 transitions. Word has length 54 [2020-10-29 13:18:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:37,254 INFO L481 AbstractCegarLoop]: Abstraction has 823 states and 1267 transitions. [2020-10-29 13:18:37,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:18:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1267 transitions. [2020-10-29 13:18:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:18:37,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:37,257 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] [2020-10-29 13:18:37,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:18:37,257 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:37,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1196249863, now seen corresponding path program 1 times [2020-10-29 13:18:37,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:37,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954525136] [2020-10-29 13:18:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:37,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:40,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:40,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:18:40,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:18:40,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2867 [2020-10-29 13:18:40,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:40,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:18:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:18:40,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:40,547 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:40,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:40,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:40,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:40,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:40,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:40,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:18:40,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:40,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:40,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:40,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954525136] [2020-10-29 13:18:40,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:40,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:18:40,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651973829] [2020-10-29 13:18:40,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:40,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:40,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:40,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:40,609 INFO L87 Difference]: Start difference. First operand 823 states and 1267 transitions. Second operand 7 states. [2020-10-29 13:18:40,930 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:18:41,557 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:18:41,809 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:42,051 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:18:42,300 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:42,511 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:18:42,932 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:18:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:43,042 INFO L93 Difference]: Finished difference Result 2747 states and 4265 transitions. [2020-10-29 13:18:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:18:43,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-29 13:18:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:43,058 INFO L225 Difference]: With dead ends: 2747 [2020-10-29 13:18:43,058 INFO L226 Difference]: Without dead ends: 2068 [2020-10-29 13:18:43,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:18:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2020-10-29 13:18:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 823. [2020-10-29 13:18:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 823 states. [2020-10-29 13:18:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1261 transitions. [2020-10-29 13:18:43,163 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1261 transitions. Word has length 54 [2020-10-29 13:18:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:43,163 INFO L481 AbstractCegarLoop]: Abstraction has 823 states and 1261 transitions. [2020-10-29 13:18:43,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1261 transitions. [2020-10-29 13:18:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:18:43,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:43,165 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] [2020-10-29 13:18:43,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:18:43,166 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:43,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1405130140, now seen corresponding path program 1 times [2020-10-29 13:18:43,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:43,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457847133] [2020-10-29 13:18:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:43,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:43,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:43,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:43,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:43,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:43,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:48,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:18:48,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:18:48,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:18:48,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:48,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:18:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:18:48,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:48,440 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:48,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:48,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:48,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:48,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:48,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:18:48,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:48,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:48,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:48,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:48,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:48,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457847133] [2020-10-29 13:18:48,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:48,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:18:48,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101636973] [2020-10-29 13:18:48,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:48,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:48,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:48,477 INFO L87 Difference]: Start difference. First operand 823 states and 1261 transitions. Second operand 7 states. [2020-10-29 13:18:48,712 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:18:49,354 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:18:49,556 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:18:49,777 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:18:50,264 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:18:50,499 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:18:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:50,561 INFO L93 Difference]: Finished difference Result 2476 states and 3810 transitions. [2020-10-29 13:18:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:18:50,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-29 13:18:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:50,574 INFO L225 Difference]: With dead ends: 2476 [2020-10-29 13:18:50,574 INFO L226 Difference]: Without dead ends: 2071 [2020-10-29 13:18:50,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:18:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2020-10-29 13:18:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1257. [2020-10-29 13:18:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1257 states. [2020-10-29 13:18:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1931 transitions. [2020-10-29 13:18:50,737 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1931 transitions. Word has length 54 [2020-10-29 13:18:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:50,738 INFO L481 AbstractCegarLoop]: Abstraction has 1257 states and 1931 transitions. [2020-10-29 13:18:50,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1931 transitions. [2020-10-29 13:18:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:18:50,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:50,740 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] [2020-10-29 13:18:50,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:18:50,740 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:50,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2043387742, now seen corresponding path program 1 times [2020-10-29 13:18:50,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:50,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705196479] [2020-10-29 13:18:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:51,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:51,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:55,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:55,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:18:55,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:18:55,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:18:55,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:55,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:55,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:55,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:55,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:18:55,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:56,069 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:56,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:56,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:56,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:56,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:56,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:56,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:18:56,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:56,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:56,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:56,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705196479] [2020-10-29 13:18:56,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:56,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:18:56,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434693079] [2020-10-29 13:18:56,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:56,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:56,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:56,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:56,127 INFO L87 Difference]: Start difference. First operand 1257 states and 1931 transitions. Second operand 7 states. [2020-10-29 13:18:56,355 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:18:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:57,123 INFO L93 Difference]: Finished difference Result 3175 states and 4900 transitions. [2020-10-29 13:18:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:18:57,124 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-29 13:18:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:57,137 INFO L225 Difference]: With dead ends: 3175 [2020-10-29 13:18:57,137 INFO L226 Difference]: Without dead ends: 2378 [2020-10-29 13:18:57,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:18:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2020-10-29 13:18:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1235. [2020-10-29 13:18:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1235 states. [2020-10-29 13:18:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1894 transitions. [2020-10-29 13:18:57,311 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1894 transitions. Word has length 54 [2020-10-29 13:18:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:57,311 INFO L481 AbstractCegarLoop]: Abstraction has 1235 states and 1894 transitions. [2020-10-29 13:18:57,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1894 transitions. [2020-10-29 13:18:57,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:18:57,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:57,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:57,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:18:57,314 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:57,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:57,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1630291214, now seen corresponding path program 1 times [2020-10-29 13:18:57,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:57,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720753167] [2020-10-29 13:18:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:57,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:58,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:18:58,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:18:58,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1226 [2020-10-29 13:18:58,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:58,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:18:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:18:58,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:58,819 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:58,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:58,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:58,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:58,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:58,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:18:58,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:58,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:58,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:58,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:58,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720753167] [2020-10-29 13:18:58,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:58,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:18:58,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213789078] [2020-10-29 13:18:58,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:18:58,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:58,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:18:58,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:18:58,857 INFO L87 Difference]: Start difference. First operand 1235 states and 1894 transitions. Second operand 4 states. [2020-10-29 13:18:59,079 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:18:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:59,698 INFO L93 Difference]: Finished difference Result 3245 states and 5000 transitions. [2020-10-29 13:18:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:18:59,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-29 13:18:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:59,710 INFO L225 Difference]: With dead ends: 3245 [2020-10-29 13:18:59,711 INFO L226 Difference]: Without dead ends: 2094 [2020-10-29 13:18:59,715 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 [2020-10-29 13:18:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-10-29 13:19:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2091. [2020-10-29 13:19:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2020-10-29 13:19:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 3187 transitions. [2020-10-29 13:19:00,023 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 3187 transitions. Word has length 55 [2020-10-29 13:19:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:00,023 INFO L481 AbstractCegarLoop]: Abstraction has 2091 states and 3187 transitions. [2020-10-29 13:19:00,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:19:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 3187 transitions. [2020-10-29 13:19:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:19:00,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:00,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:00,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:19:00,025 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:00,025 INFO L82 PathProgramCache]: Analyzing trace with hash 364732476, now seen corresponding path program 1 times [2020-10-29 13:19:00,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:00,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919001212] [2020-10-29 13:19:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:00,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:00,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:00,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:00,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:00,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:00,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:19:00,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:19:00,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-29 13:19:00,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:00,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:00,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:00,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:19:00,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:19:00,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:01,003 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:19:01,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:01,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:01,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:01,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:01,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:01,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:19:01,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:01,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:01,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:01,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:01,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:01,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:01,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919001212] [2020-10-29 13:19:01,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:01,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:19:01,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115455272] [2020-10-29 13:19:01,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:19:01,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:01,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:19:01,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:19:01,035 INFO L87 Difference]: Start difference. First operand 2091 states and 3187 transitions. Second operand 4 states. [2020-10-29 13:19:01,291 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:19:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:02,147 INFO L93 Difference]: Finished difference Result 5703 states and 8697 transitions. [2020-10-29 13:19:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:19:02,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-29 13:19:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:02,168 INFO L225 Difference]: With dead ends: 5703 [2020-10-29 13:19:02,168 INFO L226 Difference]: Without dead ends: 3662 [2020-10-29 13:19:02,174 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 [2020-10-29 13:19:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2020-10-29 13:19:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3659. [2020-10-29 13:19:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3659 states. [2020-10-29 13:19:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 5517 transitions. [2020-10-29 13:19:02,596 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 5517 transitions. Word has length 56 [2020-10-29 13:19:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:02,596 INFO L481 AbstractCegarLoop]: Abstraction has 3659 states and 5517 transitions. [2020-10-29 13:19:02,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:19:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 5517 transitions. [2020-10-29 13:19:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:19:02,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:02,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:02,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:19:02,598 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:02,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:02,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1032648036, now seen corresponding path program 1 times [2020-10-29 13:19:02,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:02,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844502124] [2020-10-29 13:19:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:02,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:03,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:19:03,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:19:03,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-29 13:19:03,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:03,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:03,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:03,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:19:03,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:19:03,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:03,826 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:19:03,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:03,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:03,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:03,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:03,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:19:03,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:03,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:19:03,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:03,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844502124] [2020-10-29 13:19:03,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:03,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:03,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504989307] [2020-10-29 13:19:03,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:03,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:03,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:03,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:03,871 INFO L87 Difference]: Start difference. First operand 3659 states and 5517 transitions. Second operand 6 states. [2020-10-29 13:19:04,132 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:19:04,776 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:19:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:05,302 INFO L93 Difference]: Finished difference Result 10811 states and 16315 transitions. [2020-10-29 13:19:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:19:05,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:19:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:05,331 INFO L225 Difference]: With dead ends: 10811 [2020-10-29 13:19:05,331 INFO L226 Difference]: Without dead ends: 7198 [2020-10-29 13:19:05,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:19:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7198 states. [2020-10-29 13:19:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7198 to 7195. [2020-10-29 13:19:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2020-10-29 13:19:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 10799 transitions. [2020-10-29 13:19:06,182 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 10799 transitions. Word has length 57 [2020-10-29 13:19:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:06,183 INFO L481 AbstractCegarLoop]: Abstraction has 7195 states and 10799 transitions. [2020-10-29 13:19:06,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 10799 transitions. [2020-10-29 13:19:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:19:06,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:06,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:06,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:19:06,184 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:06,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:06,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1160733343, now seen corresponding path program 1 times [2020-10-29 13:19:06,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:06,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390590133] [2020-10-29 13:19:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:06,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:06,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:19:06,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:19:06,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-29 13:19:06,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:06,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:06,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:06,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:19:06,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:19:06,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:06,812 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:19:06,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:06,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:06,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:06,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:06,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:06,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:19:06,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:06,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:06,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:06,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:06,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:06,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:06,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390590133] [2020-10-29 13:19:06,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:06,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:19:06,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197707383] [2020-10-29 13:19:06,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:19:06,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:19:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:19:06,838 INFO L87 Difference]: Start difference. First operand 7195 states and 10799 transitions. Second operand 4 states. [2020-10-29 13:19:07,052 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:19:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:08,402 INFO L93 Difference]: Finished difference Result 15809 states and 23715 transitions. [2020-10-29 13:19:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:19:08,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-29 13:19:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:08,439 INFO L225 Difference]: With dead ends: 15809 [2020-10-29 13:19:08,439 INFO L226 Difference]: Without dead ends: 11099 [2020-10-29 13:19:08,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:19:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11099 states. [2020-10-29 13:19:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11099 to 11096. [2020-10-29 13:19:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11096 states. [2020-10-29 13:19:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 16494 transitions. [2020-10-29 13:19:09,495 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 16494 transitions. Word has length 57 [2020-10-29 13:19:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:09,495 INFO L481 AbstractCegarLoop]: Abstraction has 11096 states and 16494 transitions. [2020-10-29 13:19:09,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:19:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 16494 transitions. [2020-10-29 13:19:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:19:09,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:09,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:09,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:19:09,496 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2060393162, now seen corresponding path program 1 times [2020-10-29 13:19:09,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:09,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107504968] [2020-10-29 13:19:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:09,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:09,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:09,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:10,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:19:10,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:19:10,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-10-29 13:19:10,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:10,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:10,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:10,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 13:19:10,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 13:19:10,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:10,215 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:19:10,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:10,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:10,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:10,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:10,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:19:10,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:10,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:10,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:10,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:10,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:10,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:10,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107504968] [2020-10-29 13:19:10,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:10,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:19:10,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114589783] [2020-10-29 13:19:10,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:19:10,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:10,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:19:10,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:19:10,245 INFO L87 Difference]: Start difference. First operand 11096 states and 16494 transitions. Second operand 4 states. [2020-10-29 13:19:10,479 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:19:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:12,639 INFO L93 Difference]: Finished difference Result 30622 states and 45202 transitions. [2020-10-29 13:19:12,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:19:12,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-29 13:19:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:12,685 INFO L225 Difference]: With dead ends: 30622 [2020-10-29 13:19:12,685 INFO L226 Difference]: Without dead ends: 19576 [2020-10-29 13:19:12,707 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 [2020-10-29 13:19:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19576 states. [2020-10-29 13:19:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19576 to 19555. [2020-10-29 13:19:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19555 states. [2020-10-29 13:19:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19555 states to 19555 states and 28418 transitions. [2020-10-29 13:19:14,503 INFO L78 Accepts]: Start accepts. Automaton has 19555 states and 28418 transitions. Word has length 58 [2020-10-29 13:19:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:14,503 INFO L481 AbstractCegarLoop]: Abstraction has 19555 states and 28418 transitions. [2020-10-29 13:19:14,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:19:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 19555 states and 28418 transitions. [2020-10-29 13:19:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:19:14,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:14,504 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] [2020-10-29 13:19:14,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:19:14,504 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash -948227540, now seen corresponding path program 1 times [2020-10-29 13:19:14,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:14,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386120280] [2020-10-29 13:19:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:14,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:15,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:16,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:19:16,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:19:16,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1616 [2020-10-29 13:19:16,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:16,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:19:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:19:16,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:16,366 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:19:16,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:16,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:16,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:16,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:16,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:19:16,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:16,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:16,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:16,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:16,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:19:16,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:16,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386120280] [2020-10-29 13:19:16,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:16,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581793424] [2020-10-29 13:19:16,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:16,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:16,403 INFO L87 Difference]: Start difference. First operand 19555 states and 28418 transitions. Second operand 6 states. [2020-10-29 13:19:16,646 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:19:17,339 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:19:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:20,900 INFO L93 Difference]: Finished difference Result 58281 states and 84550 transitions. [2020-10-29 13:19:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:19:20,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-29 13:19:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:20,989 INFO L225 Difference]: With dead ends: 58281 [2020-10-29 13:19:20,990 INFO L226 Difference]: Without dead ends: 38758 [2020-10-29 13:19:21,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38758 states. [2020-10-29 13:19:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38758 to 38755. [2020-10-29 13:19:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38755 states. [2020-10-29 13:19:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38755 states to 38755 states and 55842 transitions. [2020-10-29 13:19:25,302 INFO L78 Accepts]: Start accepts. Automaton has 38755 states and 55842 transitions. Word has length 59 [2020-10-29 13:19:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:25,302 INFO L481 AbstractCegarLoop]: Abstraction has 38755 states and 55842 transitions. [2020-10-29 13:19:25,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 38755 states and 55842 transitions. [2020-10-29 13:19:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:19:25,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:25,303 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] [2020-10-29 13:19:25,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:19:25,303 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash -176363887, now seen corresponding path program 1 times [2020-10-29 13:19:25,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:25,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337730738] [2020-10-29 13:19:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:25,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:25,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:25,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:25,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:19:25,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:19:25,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-29 13:19:25,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:25,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:25,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:25,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:19:25,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:19:25,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:25,931 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:19:25,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:25,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:25,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:25,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:25,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:25,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:19:25,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:25,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:19:25,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:25,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337730738] [2020-10-29 13:19:25,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:25,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:25,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46675437] [2020-10-29 13:19:25,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:25,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:25,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:25,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:25,979 INFO L87 Difference]: Start difference. First operand 38755 states and 55842 transitions. Second operand 6 states. [2020-10-29 13:19:26,211 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:19:26,871 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:19:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:33,281 INFO L93 Difference]: Finished difference Result 107305 states and 154086 transitions. [2020-10-29 13:19:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:19:33,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-29 13:19:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:33,381 INFO L225 Difference]: With dead ends: 107305 [2020-10-29 13:19:33,381 INFO L226 Difference]: Without dead ends: 68582 [2020-10-29 13:19:33,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68582 states. [2020-10-29 13:19:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68582 to 68579. [2020-10-29 13:19:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68579 states. [2020-10-29 13:19:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68579 states to 68579 states and 97506 transitions. [2020-10-29 13:19:40,585 INFO L78 Accepts]: Start accepts. Automaton has 68579 states and 97506 transitions. Word has length 59 [2020-10-29 13:19:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:40,586 INFO L481 AbstractCegarLoop]: Abstraction has 68579 states and 97506 transitions. [2020-10-29 13:19:40,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:40,586 INFO L276 IsEmpty]: Start isEmpty. Operand 68579 states and 97506 transitions. [2020-10-29 13:19:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:19:40,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:40,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:40,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:19:40,587 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1944664972, now seen corresponding path program 1 times [2020-10-29 13:19:40,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:40,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49937871] [2020-10-29 13:19:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:40,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:40,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:40,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:19:40,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:40,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-29 13:19:40,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:40,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:19:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-29 13:19:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:19:40,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:40,969 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:19:40,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:40,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:40,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:40,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:40,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:19:40,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:40,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:40,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:19:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:41,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49937871] [2020-10-29 13:19:41,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:41,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:41,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896281391] [2020-10-29 13:19:41,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:19:41,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:41,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:19:41,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:19:41,006 INFO L87 Difference]: Start difference. First operand 68579 states and 97506 transitions. Second operand 5 states. [2020-10-29 13:19:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:51,741 INFO L93 Difference]: Finished difference Result 106294 states and 150713 transitions. [2020-10-29 13:19:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:19:51,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-29 13:19:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:51,895 INFO L225 Difference]: With dead ends: 106294 [2020-10-29 13:19:51,895 INFO L226 Difference]: Without dead ends: 106291 [2020-10-29 13:19:51,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106291 states. [2020-10-29 13:19:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106291 to 70371. [2020-10-29 13:19:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70371 states. [2020-10-29 13:19:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70371 states to 70371 states and 98658 transitions. [2020-10-29 13:19:59,739 INFO L78 Accepts]: Start accepts. Automaton has 70371 states and 98658 transitions. Word has length 59 [2020-10-29 13:19:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:59,739 INFO L481 AbstractCegarLoop]: Abstraction has 70371 states and 98658 transitions. [2020-10-29 13:19:59,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:19:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 70371 states and 98658 transitions. [2020-10-29 13:19:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:19:59,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:59,744 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:19:59,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:19:59,745 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:59,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:59,745 INFO L82 PathProgramCache]: Analyzing trace with hash 158028823, now seen corresponding path program 1 times [2020-10-29 13:19:59,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:59,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326266579] [2020-10-29 13:19:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:59,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:59,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:59,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:59,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:00,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:04,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:04,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:20:04,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:20:04,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:20:04,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:04,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:20:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 13:20:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:20:04,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:05,035 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:05,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:05,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:05,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:05,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:05,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:05,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:20:05,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:05,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:05,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:05,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326266579] [2020-10-29 13:20:05,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:20:05,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:20:05,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811678774] [2020-10-29 13:20:05,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:20:05,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:05,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:20:05,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:20:05,070 INFO L87 Difference]: Start difference. First operand 70371 states and 98658 transitions. Second operand 6 states. [2020-10-29 13:20:05,336 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:20:06,044 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:20:06,306 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:20:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:15,557 INFO L93 Difference]: Finished difference Result 117198 states and 165279 transitions. [2020-10-29 13:20:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:20:15,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-29 13:20:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:15,705 INFO L225 Difference]: With dead ends: 117198 [2020-10-29 13:20:15,705 INFO L226 Difference]: Without dead ends: 91579 [2020-10-29 13:20:15,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:20:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91579 states. [2020-10-29 13:20:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91579 to 87731. [2020-10-29 13:20:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87731 states. [2020-10-29 13:20:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87731 states to 87731 states and 123858 transitions. [2020-10-29 13:20:25,531 INFO L78 Accepts]: Start accepts. Automaton has 87731 states and 123858 transitions. Word has length 81 [2020-10-29 13:20:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:25,531 INFO L481 AbstractCegarLoop]: Abstraction has 87731 states and 123858 transitions. [2020-10-29 13:20:25,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 87731 states and 123858 transitions. [2020-10-29 13:20:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:20:25,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:25,536 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:20:25,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:20:25,536 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:25,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1604975529, now seen corresponding path program 1 times [2020-10-29 13:20:25,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:25,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893717912] [2020-10-29 13:20:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:25,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:27,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:27,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:27,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:28,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:30,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:30,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:20:30,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:20:30,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:20:30,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:30,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:30,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:20:30,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:20:30,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:20:30,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:31,007 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:31,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:31,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:31,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:31,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:31,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:31,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:20:31,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:31,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:31,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:31,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:31,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:31,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:31,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893717912] [2020-10-29 13:20:31,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:20:31,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:20:31,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888860665] [2020-10-29 13:20:31,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:20:31,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:31,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:20:31,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:20:31,041 INFO L87 Difference]: Start difference. First operand 87731 states and 123858 transitions. Second operand 6 states. [2020-10-29 13:20:31,293 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:20:32,137 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:20:32,359 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:20:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:42,578 INFO L93 Difference]: Finished difference Result 123326 states and 174687 transitions. [2020-10-29 13:20:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:20:42,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-29 13:20:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:42,726 INFO L225 Difference]: With dead ends: 123326 [2020-10-29 13:20:42,726 INFO L226 Difference]: Without dead ends: 103195 [2020-10-29 13:20:42,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:20:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103195 states. [2020-10-29 13:20:53,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103195 to 98035. [2020-10-29 13:20:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98035 states. [2020-10-29 13:20:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98035 states to 98035 states and 138834 transitions. [2020-10-29 13:20:53,601 INFO L78 Accepts]: Start accepts. Automaton has 98035 states and 138834 transitions. Word has length 81 [2020-10-29 13:20:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:53,601 INFO L481 AbstractCegarLoop]: Abstraction has 98035 states and 138834 transitions. [2020-10-29 13:20:53,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 98035 states and 138834 transitions. [2020-10-29 13:20:53,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:20:53,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:53,606 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:20:53,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:20:53,607 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:53,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:53,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1123788428, now seen corresponding path program 1 times [2020-10-29 13:20:53,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:53,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821138669] [2020-10-29 13:20:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:53,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:53,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:53,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:54,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:54,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:55,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:55,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:57,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:58,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:58,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:20:58,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:20:58,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:20:58,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:58,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:20:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:20:58,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:58,909 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2020-10-29 13:20:59,132 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:20:59,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:59,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:59,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:59,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:59,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:59,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:20:59,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:59,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:59,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:59,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:59,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:59,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821138669] [2020-10-29 13:20:59,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:20:59,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:20:59,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557805520] [2020-10-29 13:20:59,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:20:59,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:20:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:59,169 INFO L87 Difference]: Start difference. First operand 98035 states and 138834 transitions. Second operand 9 states. [2020-10-29 13:20:59,448 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:21:02,175 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:21:02,589 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:21:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:36,667 INFO L93 Difference]: Finished difference Result 346254 states and 487422 transitions. [2020-10-29 13:21:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 13:21:36,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-29 13:21:36,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:37,370 INFO L225 Difference]: With dead ends: 346254 [2020-10-29 13:21:37,370 INFO L226 Difference]: Without dead ends: 279645 [2020-10-29 13:21:37,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:21:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279645 states.