/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=DEEPEST --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.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:53:35,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:53:35,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:53:35,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:53:35,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:53:35,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:53:35,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:53:35,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:53:35,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:53:35,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:53:35,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:53:35,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:53:35,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:53:35,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:53:35,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:53:35,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:53:35,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:53:35,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:53:35,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:53:35,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:53:35,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:53:35,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:53:35,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:53:35,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:53:35,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:53:35,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:53:35,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:53:35,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:53:35,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:53:35,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:53:35,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:53:35,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:53:35,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:53:35,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:53:35,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:53:35,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:53:35,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:53:35,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:53:35,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:53:35,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:53:35,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:53:35,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:53:36,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:53:36,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:53:36,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:53:36,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:53:36,011 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:53:36,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:53:36,012 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:53:36,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:53:36,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:53:36,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:53:36,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:53:36,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:53:36,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:53:36,013 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:53:36,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:53:36,013 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:53:36,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:53:36,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:53:36,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:53:36,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:53:36,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:53:36,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:53:36,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:53:36,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:53:36,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:53:36,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:53:36,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:53:36,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:53:36,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:53:36,016 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:53:36,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:53:36,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:53:36,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:53:36,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:53:36,422 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:53:36,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:53:36,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f96193f04/36d277b3230e4f44b4c644e567fd6682/FLAG4ab897fec [2020-10-27 23:53:37,253 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:53:37,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:53:37,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f96193f04/36d277b3230e4f44b4c644e567fd6682/FLAG4ab897fec [2020-10-27 23:53:37,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f96193f04/36d277b3230e4f44b4c644e567fd6682 [2020-10-27 23:53:37,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:53:37,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:53:37,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:53:37,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:53:37,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:53:37,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:53:37" (1/1) ... [2020-10-27 23:53:37,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b79d1d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:37, skipping insertion in model container [2020-10-27 23:53:37,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:53:37" (1/1) ... [2020-10-27 23:53:37,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:53:37,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:53:37,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:53:37,985 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:53:38,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:53:38,155 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:53:38,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38 WrapperNode [2020-10-27 23:53:38,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:53:38,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:53:38,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:53:38,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:53:38,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38" (1/1) ... [2020-10-27 23:53:38,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38" (1/1) ... [2020-10-27 23:53:38,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38" (1/1) ... [2020-10-27 23:53:38,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38" (1/1) ... [2020-10-27 23:53:38,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38" (1/1) ... [2020-10-27 23:53:38,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38" (1/1) ... [2020-10-27 23:53:38,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38" (1/1) ... [2020-10-27 23:53:38,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:53:38,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:53:38,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:53:38,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:53:38,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:53:38,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:53:38,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:53:38,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:53:38,333 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:53:38,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:53:38,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:53:38,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:53:38,334 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:53:38,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:53:38,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:53:38,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:53:38,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:53:38,334 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:53:38,335 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:53:38,335 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:53:38,335 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:53:38,335 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:53:38,335 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:53:38,335 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:53:38,336 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:53:38,336 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:53:38,336 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 23:53:38,336 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:53:38,336 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:53:38,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:53:38,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:53:38,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:53:38,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:53:38,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:53:38,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:53:38,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:53:39,278 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:53:39,279 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:53:39,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:53:39 BoogieIcfgContainer [2020-10-27 23:53:39,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:53:39,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:53:39,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:53:39,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:53:39,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:53:37" (1/3) ... [2020-10-27 23:53:39,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbda375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:53:39, skipping insertion in model container [2020-10-27 23:53:39,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:38" (2/3) ... [2020-10-27 23:53:39,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbda375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:53:39, skipping insertion in model container [2020-10-27 23:53:39,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:53:39" (3/3) ... [2020-10-27 23:53:39,290 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:53:39,314 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:53:39,320 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:53:39,334 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:53:39,378 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:53:39,379 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:53:39,379 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:53:39,379 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:53:39,379 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:53:39,379 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:53:39,379 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:53:39,380 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:53:39,415 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2020-10-27 23:53:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 23:53:39,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:39,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:39,435 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:39,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2080328782, now seen corresponding path program 1 times [2020-10-27 23:53:39,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:39,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951527209] [2020-10-27 23:53:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:39,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:40,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:40,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:40,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:42,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:44,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:44,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 23:53:44,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:53:44,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 23:53:44,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:44,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:53:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 23:53:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:53:44,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:53:45,621 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:53:45,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:53:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:45,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:45,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:45,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:53:45,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:53:45,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:53:45,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:53:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:53:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:53:45,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:53:45,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951527209] [2020-10-27 23:53:45,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:53:45,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:53:45,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990896202] [2020-10-27 23:53:45,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:53:45,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:53:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:53:45,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:53:45,711 INFO L87 Difference]: Start difference. First operand 127 states. Second operand 4 states. [2020-10-27 23:53:46,312 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:53:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:53:47,196 INFO L93 Difference]: Finished difference Result 273 states and 437 transitions. [2020-10-27 23:53:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:53:47,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-27 23:53:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:53:47,211 INFO L225 Difference]: With dead ends: 273 [2020-10-27 23:53:47,212 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 23:53:47,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:53:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 23:53:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-10-27 23:53:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 23:53:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 261 transitions. [2020-10-27 23:53:47,289 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 261 transitions. Word has length 78 [2020-10-27 23:53:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:53:47,290 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 261 transitions. [2020-10-27 23:53:47,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:53:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 261 transitions. [2020-10-27 23:53:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 23:53:47,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:47,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:47,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:53:47,298 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:47,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1585641807, now seen corresponding path program 1 times [2020-10-27 23:53:47,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:47,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451884795] [2020-10-27 23:53:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:47,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:47,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:47,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:48,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:52,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:52,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 23:53:52,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:53:52,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:53:52,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:53:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:53:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:53:52,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 23:53:52,713 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:53:52,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:53:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:52,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:52,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:52,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:53:52,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:53:52,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:53:52,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:52,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:53:52,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:53:52,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:53:52,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:53:52,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451884795] [2020-10-27 23:53:52,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:53:52,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:53:52,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183313158] [2020-10-27 23:53:52,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:53:52,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:53:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:53:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:53:52,783 INFO L87 Difference]: Start difference. First operand 182 states and 261 transitions. Second operand 4 states. [2020-10-27 23:53:53,123 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:53:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:53:53,780 INFO L93 Difference]: Finished difference Result 436 states and 663 transitions. [2020-10-27 23:53:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:53:53,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-27 23:53:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:53:53,794 INFO L225 Difference]: With dead ends: 436 [2020-10-27 23:53:53,794 INFO L226 Difference]: Without dead ends: 301 [2020-10-27 23:53:53,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:53:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-27 23:53:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-10-27 23:53:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-27 23:53:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 445 transitions. [2020-10-27 23:53:53,866 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 445 transitions. Word has length 79 [2020-10-27 23:53:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:53:53,867 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 445 transitions. [2020-10-27 23:53:53,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:53:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 445 transitions. [2020-10-27 23:53:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 23:53:53,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:53,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:53,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:53:53,875 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:53,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:53,875 INFO L82 PathProgramCache]: Analyzing trace with hash 35376944, now seen corresponding path program 1 times [2020-10-27 23:53:53,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:53,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525176964] [2020-10-27 23:53:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:53,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:53,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:54,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:54,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:55,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:58,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:58,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 23:53:58,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:53:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 23:53:58,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:53:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:53:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:53:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:59,426 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:53:59,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:53:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:59,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:59,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:59,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:53:59,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:53:59,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:53:59,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:59,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:53:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:53:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:53:59,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:53:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:53:59,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525176964] [2020-10-27 23:53:59,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:53:59,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:53:59,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925999482] [2020-10-27 23:53:59,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:53:59,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:53:59,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:53:59,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:53:59,519 INFO L87 Difference]: Start difference. First operand 298 states and 445 transitions. Second operand 4 states. [2020-10-27 23:53:59,873 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:54:00,558 INFO L93 Difference]: Finished difference Result 768 states and 1189 transitions. [2020-10-27 23:54:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:54:00,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-27 23:54:00,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:54:00,568 INFO L225 Difference]: With dead ends: 768 [2020-10-27 23:54:00,571 INFO L226 Difference]: Without dead ends: 517 [2020-10-27 23:54:00,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:54:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-27 23:54:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 514. [2020-10-27 23:54:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-27 23:54:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 785 transitions. [2020-10-27 23:54:00,632 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 785 transitions. Word has length 80 [2020-10-27 23:54:00,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:54:00,632 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 785 transitions. [2020-10-27 23:54:00,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:54:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 785 transitions. [2020-10-27 23:54:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 23:54:00,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:00,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:54:00,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:54:00,635 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:00,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:00,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1093730750, now seen corresponding path program 1 times [2020-10-27 23:54:00,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:00,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834823172] [2020-10-27 23:54:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:00,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:00,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:00,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:01,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:01,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:04,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:05,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:05,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 23:54:05,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:54:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 23:54:05,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:54:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:54:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:54:05,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:06,028 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:54:06,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:06,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:06,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:06,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:06,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:06,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 23:54:06,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:06,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:06,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:06,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:06,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:54:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:06,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834823172] [2020-10-27 23:54:06,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:06,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:54:06,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801606153] [2020-10-27 23:54:06,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:54:06,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:06,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:54:06,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:54:06,102 INFO L87 Difference]: Start difference. First operand 514 states and 785 transitions. Second operand 7 states. [2020-10-27 23:54:06,421 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:07,168 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:54:07,473 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:08,182 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:54:08,496 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:54:09,023 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:54:09,318 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:09,868 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:54:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:54:09,958 INFO L93 Difference]: Finished difference Result 4238 states and 6665 transitions. [2020-10-27 23:54:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:54:09,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-27 23:54:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:54:09,982 INFO L225 Difference]: With dead ends: 4238 [2020-10-27 23:54:09,982 INFO L226 Difference]: Without dead ends: 3771 [2020-10-27 23:54:09,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:54:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2020-10-27 23:54:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 1434. [2020-10-27 23:54:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1434 states. [2020-10-27 23:54:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 2237 transitions. [2020-10-27 23:54:10,158 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 2237 transitions. Word has length 81 [2020-10-27 23:54:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:54:10,158 INFO L481 AbstractCegarLoop]: Abstraction has 1434 states and 2237 transitions. [2020-10-27 23:54:10,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:54:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 2237 transitions. [2020-10-27 23:54:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 23:54:10,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:10,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:54:10,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:54:10,168 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash -174640925, now seen corresponding path program 1 times [2020-10-27 23:54:10,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:10,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139540278] [2020-10-27 23:54:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:10,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:10,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:10,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:10,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:13,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:13,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 23:54:13,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:54:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3637 [2020-10-27 23:54:13,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:54:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:54:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:54:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:14,142 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:54:14,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:14,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:14,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:14,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:14,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:14,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 23:54:14,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:14,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:14,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:14,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:14,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:14,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139540278] [2020-10-27 23:54:14,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:14,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:54:14,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650498756] [2020-10-27 23:54:14,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:54:14,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:14,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:54:14,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:54:14,210 INFO L87 Difference]: Start difference. First operand 1434 states and 2237 transitions. Second operand 4 states. [2020-10-27 23:54:14,512 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:54:15,211 INFO L93 Difference]: Finished difference Result 4016 states and 6305 transitions. [2020-10-27 23:54:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:54:15,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-27 23:54:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:54:15,227 INFO L225 Difference]: With dead ends: 4016 [2020-10-27 23:54:15,228 INFO L226 Difference]: Without dead ends: 2629 [2020-10-27 23:54:15,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:54:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2020-10-27 23:54:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 2626. [2020-10-27 23:54:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2626 states. [2020-10-27 23:54:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 4089 transitions. [2020-10-27 23:54:15,419 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 4089 transitions. Word has length 81 [2020-10-27 23:54:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:54:15,420 INFO L481 AbstractCegarLoop]: Abstraction has 2626 states and 4089 transitions. [2020-10-27 23:54:15,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:54:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 4089 transitions. [2020-10-27 23:54:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 23:54:15,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:15,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:54:15,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:54:15,425 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:15,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:15,426 INFO L82 PathProgramCache]: Analyzing trace with hash -516790636, now seen corresponding path program 1 times [2020-10-27 23:54:15,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:15,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262985924] [2020-10-27 23:54:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:15,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:15,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:15,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:17,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:20,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:20,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 23:54:20,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:54:20,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:54:20,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:20,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:54:20,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:54:20,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:54:20,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:20,817 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:54:20,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:20,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:20,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:20,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:20,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:20,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:54:20,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:20,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:20,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:20,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:20,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:20,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262985924] [2020-10-27 23:54:20,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:20,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:54:20,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861051189] [2020-10-27 23:54:20,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:54:20,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:54:20,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:54:20,867 INFO L87 Difference]: Start difference. First operand 2626 states and 4089 transitions. Second operand 7 states. [2020-10-27 23:54:21,218 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:21,955 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:54:22,254 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:22,917 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:54:23,195 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:54:24,005 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:24,298 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:54:24,974 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:54:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:54:25,103 INFO L93 Difference]: Finished difference Result 18105 states and 28312 transitions. [2020-10-27 23:54:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:54:25,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-27 23:54:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:54:25,189 INFO L225 Difference]: With dead ends: 18105 [2020-10-27 23:54:25,189 INFO L226 Difference]: Without dead ends: 16382 [2020-10-27 23:54:25,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:54:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16382 states. [2020-10-27 23:54:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16382 to 5209. [2020-10-27 23:54:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5209 states. [2020-10-27 23:54:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 8104 transitions. [2020-10-27 23:54:25,704 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 8104 transitions. Word has length 82 [2020-10-27 23:54:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:54:25,704 INFO L481 AbstractCegarLoop]: Abstraction has 5209 states and 8104 transitions. [2020-10-27 23:54:25,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:54:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 8104 transitions. [2020-10-27 23:54:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 23:54:25,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:25,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:54:25,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:54:25,706 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1156663446, now seen corresponding path program 1 times [2020-10-27 23:54:25,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:25,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571725806] [2020-10-27 23:54:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:25,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:25,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:25,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:27,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:30,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:30,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 23:54:30,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:54:30,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:54:30,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:30,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:54:30,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:54:30,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 23:54:30,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:31,055 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:54:31,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:31,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:31,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:31,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:31,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:54:31,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:31,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:31,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:31,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:31,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571725806] [2020-10-27 23:54:31,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:31,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:54:31,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943934188] [2020-10-27 23:54:31,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:54:31,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:31,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:54:31,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:54:31,090 INFO L87 Difference]: Start difference. First operand 5209 states and 8104 transitions. Second operand 7 states. [2020-10-27 23:54:31,411 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:32,137 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:54:32,429 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:33,176 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:54:33,474 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:54:34,193 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:34,482 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:54:35,223 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:54:35,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:54:35,369 INFO L93 Difference]: Finished difference Result 20502 states and 31909 transitions. [2020-10-27 23:54:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:54:35,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-27 23:54:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:54:35,410 INFO L225 Difference]: With dead ends: 20502 [2020-10-27 23:54:35,410 INFO L226 Difference]: Without dead ends: 17075 [2020-10-27 23:54:35,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:54:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17075 states. [2020-10-27 23:54:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17075 to 6913. [2020-10-27 23:54:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6913 states. [2020-10-27 23:54:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 10768 transitions. [2020-10-27 23:54:35,987 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 10768 transitions. Word has length 82 [2020-10-27 23:54:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:54:35,987 INFO L481 AbstractCegarLoop]: Abstraction has 6913 states and 10768 transitions. [2020-10-27 23:54:35,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:54:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 10768 transitions. [2020-10-27 23:54:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 23:54:35,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:35,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:54:35,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:54:35,989 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:35,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1869932175, now seen corresponding path program 1 times [2020-10-27 23:54:35,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:35,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961686808] [2020-10-27 23:54:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:36,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:36,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:37,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:37,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 23:54:37,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:54:37,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1481 [2020-10-27 23:54:37,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:37,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:54:37,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:54:37,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:54:37,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:37,770 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:54:37,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:37,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:37,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:37,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:37,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:54:37,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:37,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:37,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:37,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:37,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:37,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961686808] [2020-10-27 23:54:37,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:37,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:54:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931696911] [2020-10-27 23:54:37,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:54:37,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:37,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:54:37,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:54:37,813 INFO L87 Difference]: Start difference. First operand 6913 states and 10768 transitions. Second operand 4 states. [2020-10-27 23:54:38,128 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:54:39,350 INFO L93 Difference]: Finished difference Result 19568 states and 30464 transitions. [2020-10-27 23:54:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:54:39,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 23:54:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:54:39,383 INFO L225 Difference]: With dead ends: 19568 [2020-10-27 23:54:39,383 INFO L226 Difference]: Without dead ends: 12720 [2020-10-27 23:54:39,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:54:39,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12720 states. [2020-10-27 23:54:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12720 to 12717. [2020-10-27 23:54:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12717 states. [2020-10-27 23:54:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12717 states to 12717 states and 19640 transitions. [2020-10-27 23:54:40,433 INFO L78 Accepts]: Start accepts. Automaton has 12717 states and 19640 transitions. Word has length 82 [2020-10-27 23:54:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:54:40,433 INFO L481 AbstractCegarLoop]: Abstraction has 12717 states and 19640 transitions. [2020-10-27 23:54:40,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:54:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 12717 states and 19640 transitions. [2020-10-27 23:54:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:54:40,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:40,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:54:40,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:54:40,435 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:40,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash -88993325, now seen corresponding path program 1 times [2020-10-27 23:54:40,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:40,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717441164] [2020-10-27 23:54:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:40,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:40,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:41,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:43,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:43,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:54:43,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:54:43,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2951 [2020-10-27 23:54:43,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:54:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:54:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:54:43,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:43,749 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:54:43,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:43,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:43,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:43,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:43,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:43,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:54:43,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:43,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:43,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:43,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:43,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:43,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717441164] [2020-10-27 23:54:43,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:43,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:54:43,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936204863] [2020-10-27 23:54:43,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:54:43,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:43,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:54:43,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:54:43,782 INFO L87 Difference]: Start difference. First operand 12717 states and 19640 transitions. Second operand 7 states. [2020-10-27 23:54:44,123 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:44,864 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:54:45,155 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:46,082 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:54:46,362 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:54:48,439 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:54:48,731 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:50,116 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:54:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:54:50,631 INFO L93 Difference]: Finished difference Result 75850 states and 117134 transitions. [2020-10-27 23:54:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:54:50,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-27 23:54:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:54:50,767 INFO L225 Difference]: With dead ends: 75850 [2020-10-27 23:54:50,767 INFO L226 Difference]: Without dead ends: 69511 [2020-10-27 23:54:50,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:54:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69511 states. [2020-10-27 23:54:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69511 to 18962. [2020-10-27 23:54:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18962 states. [2020-10-27 23:54:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18962 states to 18962 states and 29149 transitions. [2020-10-27 23:54:52,859 INFO L78 Accepts]: Start accepts. Automaton has 18962 states and 29149 transitions. Word has length 83 [2020-10-27 23:54:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:54:52,859 INFO L481 AbstractCegarLoop]: Abstraction has 18962 states and 29149 transitions. [2020-10-27 23:54:52,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:54:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 18962 states and 29149 transitions. [2020-10-27 23:54:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:54:52,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:52,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:54:52,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:54:52,860 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash -617294147, now seen corresponding path program 1 times [2020-10-27 23:54:52,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:52,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110296788] [2020-10-27 23:54:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:52,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:53,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:53,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:56,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:56,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:54:56,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:54:56,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3118 [2020-10-27 23:54:56,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:56,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:54:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:54:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 23:54:56,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:56,334 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:54:56,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:56,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:56,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:56,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:56,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:56,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:54:56,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:56,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:56,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110296788] [2020-10-27 23:54:56,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:56,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:54:56,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475351169] [2020-10-27 23:54:56,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:54:56,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:54:56,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:54:56,374 INFO L87 Difference]: Start difference. First operand 18962 states and 29149 transitions. Second operand 7 states. [2020-10-27 23:54:56,729 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:57,475 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:54:57,790 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:54:58,781 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:54:59,089 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:55:01,491 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:55:01,808 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:55:03,307 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:55:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:55:03,839 INFO L93 Difference]: Finished difference Result 75293 states and 115634 transitions. [2020-10-27 23:55:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:55:03,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-27 23:55:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:55:04,117 INFO L225 Difference]: With dead ends: 75293 [2020-10-27 23:55:04,117 INFO L226 Difference]: Without dead ends: 62682 [2020-10-27 23:55:04,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:55:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62682 states. [2020-10-27 23:55:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62682 to 25229. [2020-10-27 23:55:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25229 states. [2020-10-27 23:55:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25229 states to 25229 states and 38808 transitions. [2020-10-27 23:55:06,398 INFO L78 Accepts]: Start accepts. Automaton has 25229 states and 38808 transitions. Word has length 83 [2020-10-27 23:55:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:55:06,399 INFO L481 AbstractCegarLoop]: Abstraction has 25229 states and 38808 transitions. [2020-10-27 23:55:06,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:55:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 25229 states and 38808 transitions. [2020-10-27 23:55:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:55:06,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:55:06,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:55:06,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:55:06,400 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:55:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:55:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1257166957, now seen corresponding path program 1 times [2020-10-27 23:55:06,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:55:06,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699122252] [2020-10-27 23:55:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:55:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:06,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:06,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:06,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:06,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:09,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:09,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:55:09,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:55:09,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3121 [2020-10-27 23:55:09,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:09,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:55:09,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:55:09,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 23:55:09,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:09,854 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:55:09,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:55:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:09,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:09,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:09,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:55:09,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:55:09,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 23:55:09,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:09,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:55:09,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:55:09,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:55:09,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:55:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:55:09,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699122252] [2020-10-27 23:55:09,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:55:09,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:55:09,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489032352] [2020-10-27 23:55:09,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:55:09,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:55:09,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:55:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:55:09,914 INFO L87 Difference]: Start difference. First operand 25229 states and 38808 transitions. Second operand 7 states. [2020-10-27 23:55:10,234 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:55:11,033 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:55:11,331 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:55:12,336 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:55:12,630 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:55:15,554 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:55:15,866 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:55:17,952 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:55:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:55:18,751 INFO L93 Difference]: Finished difference Result 85269 states and 130937 transitions. [2020-10-27 23:55:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:55:18,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-27 23:55:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:55:18,856 INFO L225 Difference]: With dead ends: 85269 [2020-10-27 23:55:18,857 INFO L226 Difference]: Without dead ends: 72658 [2020-10-27 23:55:18,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:55:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72658 states. [2020-10-27 23:55:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72658 to 31501. [2020-10-27 23:55:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31501 states. [2020-10-27 23:55:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31501 states to 31501 states and 48472 transitions. [2020-10-27 23:55:21,801 INFO L78 Accepts]: Start accepts. Automaton has 31501 states and 48472 transitions. Word has length 83 [2020-10-27 23:55:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:55:21,801 INFO L481 AbstractCegarLoop]: Abstraction has 31501 states and 48472 transitions. [2020-10-27 23:55:21,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:55:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31501 states and 48472 transitions. [2020-10-27 23:55:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:55:21,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:55:21,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:55:21,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:55:21,802 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:55:21,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:55:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1769428664, now seen corresponding path program 1 times [2020-10-27 23:55:21,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:55:21,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413643714] [2020-10-27 23:55:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:55:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:21,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:21,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:22,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:22,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:55:22,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:55:22,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-27 23:55:22,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:55:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:55:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 23:55:22,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:23,034 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:55:23,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:55:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:23,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:23,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:23,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:55:23,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:55:23,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:55:23,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:55:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:55:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:55:23,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:55:23,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413643714] [2020-10-27 23:55:23,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:55:23,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:55:23,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419283985] [2020-10-27 23:55:23,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:55:23,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:55:23,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:55:23,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:55:23,077 INFO L87 Difference]: Start difference. First operand 31501 states and 48472 transitions. Second operand 9 states. [2020-10-27 23:55:23,459 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:55:24,458 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:55:27,166 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:55:27,531 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:55:27,880 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:55:28,233 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:55:28,519 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:55:29,827 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:55:30,186 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:55:30,530 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:55:30,854 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:55:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:55:59,093 INFO L93 Difference]: Finished difference Result 408641 states and 629125 transitions. [2020-10-27 23:55:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 23:55:59,094 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-27 23:55:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:00,001 INFO L225 Difference]: With dead ends: 408641 [2020-10-27 23:56:00,002 INFO L226 Difference]: Without dead ends: 377214 [2020-10-27 23:56:00,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-27 23:56:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377214 states. [2020-10-27 23:56:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377214 to 62941. [2020-10-27 23:56:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62941 states. [2020-10-27 23:56:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62941 states to 62941 states and 95597 transitions. [2020-10-27 23:56:10,116 INFO L78 Accepts]: Start accepts. Automaton has 62941 states and 95597 transitions. Word has length 83 [2020-10-27 23:56:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:10,116 INFO L481 AbstractCegarLoop]: Abstraction has 62941 states and 95597 transitions. [2020-10-27 23:56:10,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:56:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 62941 states and 95597 transitions. [2020-10-27 23:56:10,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 23:56:10,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:10,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:56:10,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:56:10,118 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1983010877, now seen corresponding path program 1 times [2020-10-27 23:56:10,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:10,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817486609] [2020-10-27 23:56:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:10,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:10,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:10,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:10,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:10,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:10,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 23:56:10,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:56:10,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-27 23:56:10,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:10,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:56:10,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 23:56:10,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:56:10,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:11,365 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:56:11,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:11,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:11,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:11,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:11,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:11,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 23:56:11,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:11,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:11,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:11,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:11,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:11,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817486609] [2020-10-27 23:56:11,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:11,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:56:11,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957049571] [2020-10-27 23:56:11,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:56:11,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:11,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:56:11,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:56:11,422 INFO L87 Difference]: Start difference. First operand 62941 states and 95597 transitions. Second operand 5 states. [2020-10-27 23:56:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:26,118 INFO L93 Difference]: Finished difference Result 128352 states and 193647 transitions. [2020-10-27 23:56:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:56:26,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-27 23:56:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:26,293 INFO L225 Difference]: With dead ends: 128352 [2020-10-27 23:56:26,293 INFO L226 Difference]: Without dead ends: 128349 [2020-10-27 23:56:26,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:56:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128349 states. [2020-10-27 23:56:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128349 to 65501. [2020-10-27 23:56:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65501 states. [2020-10-27 23:56:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65501 states to 65501 states and 98157 transitions. [2020-10-27 23:56:34,790 INFO L78 Accepts]: Start accepts. Automaton has 65501 states and 98157 transitions. Word has length 85 [2020-10-27 23:56:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:34,791 INFO L481 AbstractCegarLoop]: Abstraction has 65501 states and 98157 transitions. [2020-10-27 23:56:34,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:56:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 65501 states and 98157 transitions. [2020-10-27 23:56:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 23:56:34,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:34,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:56:34,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:56:34,793 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1690426786, now seen corresponding path program 1 times [2020-10-27 23:56:34,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:34,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108583756] [2020-10-27 23:56:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:34,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:35,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:35,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 23:56:35,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:56:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-27 23:56:35,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:56:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:56:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 23:56:35,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:36,137 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:56:36,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:36,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:36,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:36,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:36,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:36,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:56:36,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:36,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:36,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108583756] [2020-10-27 23:56:36,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:36,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:56:36,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672116719] [2020-10-27 23:56:36,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:56:36,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:36,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:56:36,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:56:36,186 INFO L87 Difference]: Start difference. First operand 65501 states and 98157 transitions. Second operand 9 states. [2020-10-27 23:56:36,660 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:56:37,822 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:56:41,802 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:56:42,228 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:56:42,588 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:56:42,935 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:56:43,283 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:56:46,178 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:56:46,610 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:56:47,013 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:56:47,380 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 184