/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:15:25,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:15:25,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:15:25,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:15:25,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:15:25,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:15:25,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:15:25,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:15:25,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:15:25,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:15:25,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:15:25,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:15:25,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:15:25,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:15:25,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:15:25,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:15:25,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:15:25,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:15:25,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:15:25,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:15:25,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:15:25,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:15:25,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:15:25,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:15:25,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:15:25,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:15:25,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:15:25,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:15:25,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:15:25,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:15:25,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:15:25,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:15:25,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:15:25,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:15:25,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:15:25,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:15:25,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:15:25,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:15:25,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:15:25,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:15:25,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:15:25,437 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 [2020-10-28 18:15:25,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:15:25,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:15:25,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:15:25,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:15:25,499 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:15:25,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:15:25,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:15:25,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:15:25,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:15:25,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:15:25,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:15:25,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:15:25,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:15:25,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:15:25,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:15:25,502 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:15:25,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:15:25,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:15:25,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:15:25,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:15:25,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:15:25,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:15:25,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:15:25,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:15:25,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:15:25,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:15:25,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:15:25,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:15:25,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:15:25,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:15:25,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:15:25,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:15:25,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:15:25,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:15:25,987 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:15:25,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:15:26,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a542ed69/18c1fee8e3d64b8d8cfbf980c54d6636/FLAG78954cb24 [2020-10-28 18:15:26,920 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:15:26,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:15:26,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a542ed69/18c1fee8e3d64b8d8cfbf980c54d6636/FLAG78954cb24 [2020-10-28 18:15:27,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a542ed69/18c1fee8e3d64b8d8cfbf980c54d6636 [2020-10-28 18:15:27,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:15:27,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:15:27,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:15:27,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:15:27,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:15:27,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:15:27" (1/1) ... [2020-10-28 18:15:27,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa99bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27, skipping insertion in model container [2020-10-28 18:15:27,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:15:27" (1/1) ... [2020-10-28 18:15:27,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:15:27,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:15:27,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:15:27,654 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:15:27,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:15:27,873 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:15:27,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27 WrapperNode [2020-10-28 18:15:27,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:15:27,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:15:27,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:15:27,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:15:27,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27" (1/1) ... [2020-10-28 18:15:27,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27" (1/1) ... [2020-10-28 18:15:27,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27" (1/1) ... [2020-10-28 18:15:27,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27" (1/1) ... [2020-10-28 18:15:27,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27" (1/1) ... [2020-10-28 18:15:28,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27" (1/1) ... [2020-10-28 18:15:28,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27" (1/1) ... [2020-10-28 18:15:28,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:15:28,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:15:28,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:15:28,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:15:28,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27" (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 [2020-10-28 18:15:28,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:15:28,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:15:28,129 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:15:28,129 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:15:28,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:15:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:15:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:15:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:15:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:15:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:15:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:15:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:15:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:15:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:15:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:15:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:15:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:15:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:15:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:15:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:15:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:15:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:15:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:15:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:15:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:15:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:15:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:15:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:15:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:15:30,069 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:15:30,069 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:15:30,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:15:30 BoogieIcfgContainer [2020-10-28 18:15:30,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:15:30,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:15:30,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:15:30,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:15:30,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:15:27" (1/3) ... [2020-10-28 18:15:30,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a45b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:15:30, skipping insertion in model container [2020-10-28 18:15:30,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:27" (2/3) ... [2020-10-28 18:15:30,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a45b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:15:30, skipping insertion in model container [2020-10-28 18:15:30,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:15:30" (3/3) ... [2020-10-28 18:15:30,083 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:15:30,096 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:15:30,102 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:15:30,116 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:15:30,147 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:15:30,147 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:15:30,148 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:15:30,148 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:15:30,148 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:15:30,148 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:15:30,148 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:15:30,149 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:15:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states. [2020-10-28 18:15:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 18:15:30,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:30,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:30,192 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:30,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:30,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1187780318, now seen corresponding path program 1 times [2020-10-28 18:15:30,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:30,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936657265] [2020-10-28 18:15:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:30,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:31,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:31,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:32,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:32,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:35,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:35,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 18:15:35,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:15:35,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 18:15:35,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:35,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:35,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:15:35,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 18:15:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 18:15:35,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:15:37,044 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:15:37,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:37,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:37,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:37,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:37,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:15:37,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:37,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:37,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:37,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:37,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:37,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:15:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:37,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936657265] [2020-10-28 18:15:37,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:37,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:15:37,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971069819] [2020-10-28 18:15:37,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:15:37,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:37,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:15:37,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:15:37,210 INFO L87 Difference]: Start difference. First operand 323 states. Second operand 4 states. [2020-10-28 18:15:38,582 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 281 [2020-10-28 18:15:41,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:41,608 INFO L93 Difference]: Finished difference Result 592 states and 1016 transitions. [2020-10-28 18:15:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:15:41,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-28 18:15:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:41,642 INFO L225 Difference]: With dead ends: 592 [2020-10-28 18:15:41,645 INFO L226 Difference]: Without dead ends: 442 [2020-10-28 18:15:41,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:15:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-28 18:15:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 438. [2020-10-28 18:15:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-28 18:15:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 735 transitions. [2020-10-28 18:15:41,788 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 735 transitions. Word has length 103 [2020-10-28 18:15:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:41,790 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 735 transitions. [2020-10-28 18:15:41,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:15:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 735 transitions. [2020-10-28 18:15:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 18:15:41,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:41,796 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:41,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:15:41,796 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1326774359, now seen corresponding path program 1 times [2020-10-28 18:15:41,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:41,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845335578] [2020-10-28 18:15:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:41,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:41,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:42,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:43,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:44,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:44,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:46,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:46,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 18:15:46,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:15:46,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:15:46,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:46,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:15:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:15:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 18:15:46,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:15:48,108 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:15:48,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:48,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:48,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:48,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:48,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:48,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 18:15:48,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:48,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:48,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:48,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845335578] [2020-10-28 18:15:48,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:48,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:15:48,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423212230] [2020-10-28 18:15:48,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:15:48,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:48,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:15:48,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:15:48,218 INFO L87 Difference]: Start difference. First operand 438 states and 735 transitions. Second operand 5 states. [2020-10-28 18:15:53,080 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:15:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:53,252 INFO L93 Difference]: Finished difference Result 1250 states and 2098 transitions. [2020-10-28 18:15:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:15:53,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-28 18:15:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:53,264 INFO L225 Difference]: With dead ends: 1250 [2020-10-28 18:15:53,264 INFO L226 Difference]: Without dead ends: 847 [2020-10-28 18:15:53,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:15:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2020-10-28 18:15:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 844. [2020-10-28 18:15:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-10-28 18:15:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1414 transitions. [2020-10-28 18:15:53,371 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1414 transitions. Word has length 106 [2020-10-28 18:15:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:53,374 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1414 transitions. [2020-10-28 18:15:53,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:15:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1414 transitions. [2020-10-28 18:15:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 18:15:53,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:53,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:53,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:15:53,381 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:53,382 INFO L82 PathProgramCache]: Analyzing trace with hash -195130947, now seen corresponding path program 1 times [2020-10-28 18:15:53,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:53,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440556244] [2020-10-28 18:15:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:53,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:53,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:53,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:53,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:54,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:54,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:58,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:58,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 18:15:58,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:15:58,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 18:15:58,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:58,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:15:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:15:58,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 18:15:58,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:15:59,958 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:15:59,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:59,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:00,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:00,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:00,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:00,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 18:16:00,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:00,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:00,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:00,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:00,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:00,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:00,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440556244] [2020-10-28 18:16:00,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:00,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:00,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251708160] [2020-10-28 18:16:00,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:00,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:00,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:00,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:00,095 INFO L87 Difference]: Start difference. First operand 844 states and 1414 transitions. Second operand 5 states. [2020-10-28 18:16:04,353 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:16:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:04,525 INFO L93 Difference]: Finished difference Result 2380 states and 3978 transitions. [2020-10-28 18:16:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:04,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-28 18:16:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:04,541 INFO L225 Difference]: With dead ends: 2380 [2020-10-28 18:16:04,541 INFO L226 Difference]: Without dead ends: 1637 [2020-10-28 18:16:04,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2020-10-28 18:16:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1634. [2020-10-28 18:16:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1634 states. [2020-10-28 18:16:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2730 transitions. [2020-10-28 18:16:04,684 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2730 transitions. Word has length 108 [2020-10-28 18:16:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:04,686 INFO L481 AbstractCegarLoop]: Abstraction has 1634 states and 2730 transitions. [2020-10-28 18:16:04,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2730 transitions. [2020-10-28 18:16:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 18:16:04,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:04,697 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:04,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:16:04,697 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:04,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:04,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1589252076, now seen corresponding path program 1 times [2020-10-28 18:16:04,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:04,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804098973] [2020-10-28 18:16:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:04,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:04,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:05,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:05,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:06,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:09,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:09,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 18:16:09,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:16:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:16:09,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:09,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:09,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:09,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 18:16:09,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:11,170 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:16:11,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:11,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:11,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:11,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:11,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:11,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:16:11,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:11,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:11,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:11,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804098973] [2020-10-28 18:16:11,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:11,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:11,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14672659] [2020-10-28 18:16:11,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:11,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:11,252 INFO L87 Difference]: Start difference. First operand 1634 states and 2730 transitions. Second operand 5 states. [2020-10-28 18:16:15,893 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:16:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:16,111 INFO L93 Difference]: Finished difference Result 4698 states and 7834 transitions. [2020-10-28 18:16:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:16,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-28 18:16:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:16,132 INFO L225 Difference]: With dead ends: 4698 [2020-10-28 18:16:16,132 INFO L226 Difference]: Without dead ends: 3209 [2020-10-28 18:16:16,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2020-10-28 18:16:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 3206. [2020-10-28 18:16:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3206 states. [2020-10-28 18:16:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 5334 transitions. [2020-10-28 18:16:16,457 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 5334 transitions. Word has length 108 [2020-10-28 18:16:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:16,457 INFO L481 AbstractCegarLoop]: Abstraction has 3206 states and 5334 transitions. [2020-10-28 18:16:16,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 5334 transitions. [2020-10-28 18:16:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 18:16:16,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:16,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:16,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:16:16,465 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash -927500302, now seen corresponding path program 1 times [2020-10-28 18:16:16,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:16,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652547857] [2020-10-28 18:16:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:16,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:19,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:21,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:21,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 18:16:21,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:16:21,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:16:21,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:21,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:21,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:21,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:21,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 18:16:21,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:22,739 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:16:22,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:22,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:22,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:22,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:22,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:22,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:16:22,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:22,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:22,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:22,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652547857] [2020-10-28 18:16:22,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:22,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:22,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274630457] [2020-10-28 18:16:22,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:22,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:22,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:22,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:22,815 INFO L87 Difference]: Start difference. First operand 3206 states and 5334 transitions. Second operand 5 states. [2020-10-28 18:16:27,236 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:16:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:27,473 INFO L93 Difference]: Finished difference Result 9248 states and 15356 transitions. [2020-10-28 18:16:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:27,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-28 18:16:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:27,507 INFO L225 Difference]: With dead ends: 9248 [2020-10-28 18:16:27,508 INFO L226 Difference]: Without dead ends: 6225 [2020-10-28 18:16:27,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6225 states. [2020-10-28 18:16:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6225 to 6222. [2020-10-28 18:16:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6222 states. [2020-10-28 18:16:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 10276 transitions. [2020-10-28 18:16:28,156 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 10276 transitions. Word has length 109 [2020-10-28 18:16:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:28,157 INFO L481 AbstractCegarLoop]: Abstraction has 6222 states and 10276 transitions. [2020-10-28 18:16:28,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 10276 transitions. [2020-10-28 18:16:28,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 18:16:28,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:28,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:28,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:16:28,169 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:28,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1336106604, now seen corresponding path program 1 times [2020-10-28 18:16:28,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:28,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67349795] [2020-10-28 18:16:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:28,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:28,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:28,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:28,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:28,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:29,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:33,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:33,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 18:16:33,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:16:33,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:16:33,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:33,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 18:16:33,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:34,489 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:16:34,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:34,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:34,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:34,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:34,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:16:34,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:34,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:34,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:34,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67349795] [2020-10-28 18:16:34,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:34,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:34,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046075033] [2020-10-28 18:16:34,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:34,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:34,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:34,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:34,552 INFO L87 Difference]: Start difference. First operand 6222 states and 10276 transitions. Second operand 5 states. [2020-10-28 18:16:38,880 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:16:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:39,239 INFO L93 Difference]: Finished difference Result 17959 states and 29624 transitions. [2020-10-28 18:16:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:39,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-10-28 18:16:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:39,298 INFO L225 Difference]: With dead ends: 17959 [2020-10-28 18:16:39,298 INFO L226 Difference]: Without dead ends: 11764 [2020-10-28 18:16:39,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11764 states. [2020-10-28 18:16:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11764 to 11761. [2020-10-28 18:16:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11761 states. [2020-10-28 18:16:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11761 states to 11761 states and 19288 transitions. [2020-10-28 18:16:40,425 INFO L78 Accepts]: Start accepts. Automaton has 11761 states and 19288 transitions. Word has length 110 [2020-10-28 18:16:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:40,425 INFO L481 AbstractCegarLoop]: Abstraction has 11761 states and 19288 transitions. [2020-10-28 18:16:40,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 11761 states and 19288 transitions. [2020-10-28 18:16:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 18:16:40,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:40,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:40,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:16:40,447 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash -721358926, now seen corresponding path program 1 times [2020-10-28 18:16:40,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:40,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893657599] [2020-10-28 18:16:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:40,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:40,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:40,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:40,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:40,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:40,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:42,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:45,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:45,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 18:16:45,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:16:45,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:16:45,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:45,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:45,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:45,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:45,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 18:16:45,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:46,817 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:16:46,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:46,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:46,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:46,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:46,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:46,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:16:46,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:46,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:46,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:46,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893657599] [2020-10-28 18:16:46,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:46,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:46,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855808220] [2020-10-28 18:16:46,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:46,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:46,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:46,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:46,875 INFO L87 Difference]: Start difference. First operand 11761 states and 19288 transitions. Second operand 5 states. [2020-10-28 18:16:52,409 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:16:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:53,100 INFO L93 Difference]: Finished difference Result 33153 states and 54173 transitions. [2020-10-28 18:16:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:53,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-10-28 18:16:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:53,162 INFO L225 Difference]: With dead ends: 33153 [2020-10-28 18:16:53,163 INFO L226 Difference]: Without dead ends: 22842 [2020-10-28 18:16:53,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22842 states. [2020-10-28 18:16:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22842 to 22839. [2020-10-28 18:16:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22839 states. [2020-10-28 18:16:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22839 states to 22839 states and 37225 transitions. [2020-10-28 18:16:55,225 INFO L78 Accepts]: Start accepts. Automaton has 22839 states and 37225 transitions. Word has length 110 [2020-10-28 18:16:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:55,225 INFO L481 AbstractCegarLoop]: Abstraction has 22839 states and 37225 transitions. [2020-10-28 18:16:55,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 22839 states and 37225 transitions. [2020-10-28 18:16:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 18:16:55,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:55,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:55,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:16:55,258 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:55,259 INFO L82 PathProgramCache]: Analyzing trace with hash -421903981, now seen corresponding path program 1 times [2020-10-28 18:16:55,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:55,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073859539] [2020-10-28 18:16:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:55,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:58,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:00,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:00,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 18:17:00,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:17:00,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 18:17:00,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:00,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:00,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:17:00,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 18:17:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 18:17:00,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:01,526 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:01,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:01,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:01,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:01,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:01,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:01,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:17:01,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:01,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:01,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:01,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:01,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:01,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:01,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073859539] [2020-10-28 18:17:01,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:01,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:17:01,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839699908] [2020-10-28 18:17:01,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:17:01,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:01,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:17:01,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:17:01,580 INFO L87 Difference]: Start difference. First operand 22839 states and 37225 transitions. Second operand 4 states. [2020-10-28 18:17:02,831 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 281 [2020-10-28 18:17:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:08,191 INFO L93 Difference]: Finished difference Result 50621 states and 83437 transitions. [2020-10-28 18:17:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:17:08,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-28 18:17:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:08,286 INFO L225 Difference]: With dead ends: 50621 [2020-10-28 18:17:08,286 INFO L226 Difference]: Without dead ends: 36186 [2020-10-28 18:17:08,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36186 states. [2020-10-28 18:17:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36186 to 36055. [2020-10-28 18:17:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36055 states. [2020-10-28 18:17:11,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36055 states to 36055 states and 58953 transitions. [2020-10-28 18:17:11,885 INFO L78 Accepts]: Start accepts. Automaton has 36055 states and 58953 transitions. Word has length 111 [2020-10-28 18:17:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:11,885 INFO L481 AbstractCegarLoop]: Abstraction has 36055 states and 58953 transitions. [2020-10-28 18:17:11,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:17:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 36055 states and 58953 transitions. [2020-10-28 18:17:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 18:17:11,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:11,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:11,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:17:11,917 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash 128951696, now seen corresponding path program 1 times [2020-10-28 18:17:11,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:11,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176982766] [2020-10-28 18:17:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:11,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:16,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:16,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 18:17:16,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:17:16,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:17:16,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:16,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:16,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 18:17:16,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:18,206 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:18,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:18,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:18,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:18,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:18,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:18,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:17:18,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:18,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:18,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:18,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:18,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:18,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:18,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176982766] [2020-10-28 18:17:18,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:18,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:18,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511591598] [2020-10-28 18:17:18,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:18,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:18,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:18,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:18,274 INFO L87 Difference]: Start difference. First operand 36055 states and 58953 transitions. Second operand 5 states. [2020-10-28 18:17:25,841 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:17:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:29,761 INFO L93 Difference]: Finished difference Result 104974 states and 171530 transitions. [2020-10-28 18:17:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:29,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-10-28 18:17:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:29,941 INFO L225 Difference]: With dead ends: 104974 [2020-10-28 18:17:29,942 INFO L226 Difference]: Without dead ends: 70635 [2020-10-28 18:17:30,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70635 states. [2020-10-28 18:17:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70635 to 70632. [2020-10-28 18:17:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70632 states. [2020-10-28 18:17:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70632 states to 70632 states and 114854 transitions. [2020-10-28 18:17:37,918 INFO L78 Accepts]: Start accepts. Automaton has 70632 states and 114854 transitions. Word has length 115 [2020-10-28 18:17:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:37,918 INFO L481 AbstractCegarLoop]: Abstraction has 70632 states and 114854 transitions. [2020-10-28 18:17:37,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 70632 states and 114854 transitions. [2020-10-28 18:17:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 18:17:37,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:37,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:37,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:17:37,964 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash 614408136, now seen corresponding path program 1 times [2020-10-28 18:17:37,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:37,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737091149] [2020-10-28 18:17:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:38,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:38,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:38,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:43,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:43,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 18:17:43,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:17:43,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:17:43,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:43,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:43,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:43,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:43,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 18:17:43,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:44,306 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:17:44,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:44,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:44,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:44,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:44,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:17:44,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:44,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:44,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:44,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737091149] [2020-10-28 18:17:44,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:44,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:44,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883462916] [2020-10-28 18:17:44,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:44,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:44,499 INFO L87 Difference]: Start difference. First operand 70632 states and 114854 transitions. Second operand 5 states. [2020-10-28 18:17:54,238 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:18:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:02,581 INFO L93 Difference]: Finished difference Result 209166 states and 340242 transitions. [2020-10-28 18:18:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:02,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-28 18:18:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:03,047 INFO L225 Difference]: With dead ends: 209166 [2020-10-28 18:18:03,048 INFO L226 Difference]: Without dead ends: 138664 [2020-10-28 18:18:03,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:03,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138664 states. [2020-10-28 18:18:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138664 to 138661. [2020-10-28 18:18:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138661 states. [2020-10-28 18:18:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138661 states to 138661 states and 224442 transitions. [2020-10-28 18:18:18,528 INFO L78 Accepts]: Start accepts. Automaton has 138661 states and 224442 transitions. Word has length 117 [2020-10-28 18:18:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:18,529 INFO L481 AbstractCegarLoop]: Abstraction has 138661 states and 224442 transitions. [2020-10-28 18:18:18,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 138661 states and 224442 transitions. [2020-10-28 18:18:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 18:18:18,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:18,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:18:18,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:18:18,633 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:18,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1870648543, now seen corresponding path program 1 times [2020-10-28 18:18:18,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:18,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094165026] [2020-10-28 18:18:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:18,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:18,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:18,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:23,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 18:18:23,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:18:23,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:18:23,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:23,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:23,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:23,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:23,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 18:18:23,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:24,973 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:18:24,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:24,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:24,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:24,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:24,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:24,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:18:24,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:24,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:24,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:24,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:24,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:25,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094165026] [2020-10-28 18:18:25,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:25,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707115203] [2020-10-28 18:18:25,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:25,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:25,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:25,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:25,030 INFO L87 Difference]: Start difference. First operand 138661 states and 224442 transitions. Second operand 5 states. [2020-10-28 18:18:39,515 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:18:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:57,090 INFO L93 Difference]: Finished difference Result 407375 states and 659330 transitions. [2020-10-28 18:18:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:57,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-28 18:18:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:57,686 INFO L225 Difference]: With dead ends: 407375 [2020-10-28 18:18:57,687 INFO L226 Difference]: Without dead ends: 270534 [2020-10-28 18:18:57,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270534 states.