/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:26:53,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:26:53,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:26:53,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:26:53,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:26:53,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:26:53,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:26:53,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:26:53,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:26:53,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:26:53,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:26:53,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:26:53,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:26:53,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:26:53,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:26:53,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:26:53,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:26:53,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:26:53,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:26:53,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:26:53,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:26:53,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:26:53,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:26:53,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:26:53,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:26:53,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:26:53,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:26:53,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:26:53,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:26:53,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:26:53,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:26:53,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:26:53,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:26:53,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:26:53,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:26:53,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:26:53,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:26:53,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:26:53,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:26:53,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:26:53,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:26:53,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:26:53,194 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:26:53,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:26:53,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:26:53,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:26:53,200 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:26:53,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:26:53,201 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:26:53,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:26:53,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:26:53,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:26:53,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:26:53,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:26:53,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:26:53,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:26:53,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:26:53,204 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:26:53,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:26:53,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:26:53,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:26:53,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:26:53,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:26:53,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:26:53,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:26:53,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:26:53,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:26:53,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:26:53,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:26:53,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:26:53,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:26:53,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:26:53,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:26:53,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:26:53,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:26:53,718 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:26:53,719 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:26:53,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:26:53,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/950f90247/ca9a7ab94eb4493a8398655816004c2b/FLAG1af7effad [2020-10-27 23:26:54,490 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:26:54,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:26:54,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/950f90247/ca9a7ab94eb4493a8398655816004c2b/FLAG1af7effad [2020-10-27 23:26:54,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/950f90247/ca9a7ab94eb4493a8398655816004c2b [2020-10-27 23:26:54,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:26:54,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:26:54,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:26:54,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:26:54,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:26:54,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:26:54" (1/1) ... [2020-10-27 23:26:54,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11344cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:54, skipping insertion in model container [2020-10-27 23:26:54,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:26:54" (1/1) ... [2020-10-27 23:26:54,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:26:54,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:26:55,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:26:55,435 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:26:55,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:26:55,626 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:26:55,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55 WrapperNode [2020-10-27 23:26:55,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:26:55,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:26:55,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:26:55,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:26:55,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55" (1/1) ... [2020-10-27 23:26:55,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55" (1/1) ... [2020-10-27 23:26:55,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55" (1/1) ... [2020-10-27 23:26:55,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55" (1/1) ... [2020-10-27 23:26:55,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55" (1/1) ... [2020-10-27 23:26:55,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55" (1/1) ... [2020-10-27 23:26:55,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55" (1/1) ... [2020-10-27 23:26:55,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:26:55,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:26:55,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:26:55,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:26:55,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:26:55,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:26:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:26:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:26:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:26:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:26:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:26:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:26:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:26:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:26:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:26:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:26:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:26:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:26:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:26:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:26:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:26:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:26:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:26:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:26:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:26:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:26:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:26:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:26:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:26:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:26:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:26:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:26:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:26:57,391 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:26:57,392 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:26:57,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:26:57 BoogieIcfgContainer [2020-10-27 23:26:57,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:26:57,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:26:57,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:26:57,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:26:57,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:26:54" (1/3) ... [2020-10-27 23:26:57,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78edbe6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:26:57, skipping insertion in model container [2020-10-27 23:26:57,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:55" (2/3) ... [2020-10-27 23:26:57,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78edbe6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:26:57, skipping insertion in model container [2020-10-27 23:26:57,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:26:57" (3/3) ... [2020-10-27 23:26:57,404 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:26:57,417 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:26:57,425 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:26:57,440 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:26:57,497 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:26:57,498 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:26:57,498 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:26:57,498 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:26:57,498 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:26:57,498 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:26:57,498 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:26:57,498 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:26:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states. [2020-10-27 23:26:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 23:26:57,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:57,547 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:26:57,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:57,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1270658696, now seen corresponding path program 1 times [2020-10-27 23:26:57,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:57,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605446070] [2020-10-27 23:26:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:58,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:58,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:58,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:59,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:59,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:59,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:59,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:59,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:59,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:00,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:00,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:02,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:03,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 23:27:03,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:27:03,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 23:27:03,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:03,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 23:27:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 23:27:03,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:27:03,539 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:27:03,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:03,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:03,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:03,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:03,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 23:27:03,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:03,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:03,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:03,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:03,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:03,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605446070] [2020-10-27 23:27:03,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:03,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:03,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029825170] [2020-10-27 23:27:03,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:03,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:03,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:03,701 INFO L87 Difference]: Start difference. First operand 321 states. Second operand 4 states. [2020-10-27 23:27:04,147 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 23:27:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:06,188 INFO L93 Difference]: Finished difference Result 647 states and 1128 transitions. [2020-10-27 23:27:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:06,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-10-27 23:27:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:06,210 INFO L225 Difference]: With dead ends: 647 [2020-10-27 23:27:06,211 INFO L226 Difference]: Without dead ends: 516 [2020-10-27 23:27:06,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-10-27 23:27:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 513. [2020-10-27 23:27:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-27 23:27:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 762 transitions. [2020-10-27 23:27:06,334 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 762 transitions. Word has length 151 [2020-10-27 23:27:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:06,335 INFO L481 AbstractCegarLoop]: Abstraction has 513 states and 762 transitions. [2020-10-27 23:27:06,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 762 transitions. [2020-10-27 23:27:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 23:27:06,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:06,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:06,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:27:06,342 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:06,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:06,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1027994380, now seen corresponding path program 1 times [2020-10-27 23:27:06,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:06,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953405266] [2020-10-27 23:27:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:06,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:06,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:06,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:06,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:07,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:07,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:07,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:07,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:07,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:08,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:11,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:11,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:11,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 23:27:11,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:27:11,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:27:11,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:11,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:11,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:27:11,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 23:27:11,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:27:11,917 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:27:11,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:11,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:11,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:11,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:11,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:11,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:27:11,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:11,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:11,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:11,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:11,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:12,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953405266] [2020-10-27 23:27:12,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:12,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:12,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296766614] [2020-10-27 23:27:12,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:12,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:12,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:12,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:12,103 INFO L87 Difference]: Start difference. First operand 513 states and 762 transitions. Second operand 5 states. [2020-10-27 23:27:14,339 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 23:27:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:15,291 INFO L93 Difference]: Finished difference Result 1473 states and 2181 transitions. [2020-10-27 23:27:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:27:15,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-27 23:27:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:15,303 INFO L225 Difference]: With dead ends: 1473 [2020-10-27 23:27:15,303 INFO L226 Difference]: Without dead ends: 981 [2020-10-27 23:27:15,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:27:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2020-10-27 23:27:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 978. [2020-10-27 23:27:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-10-27 23:27:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1438 transitions. [2020-10-27 23:27:15,425 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1438 transitions. Word has length 151 [2020-10-27 23:27:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:15,425 INFO L481 AbstractCegarLoop]: Abstraction has 978 states and 1438 transitions. [2020-10-27 23:27:15,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1438 transitions. [2020-10-27 23:27:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-27 23:27:15,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:15,431 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:15,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:27:15,432 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1417780737, now seen corresponding path program 1 times [2020-10-27 23:27:15,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:15,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87984292] [2020-10-27 23:27:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:15,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:16,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:16,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:17,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:17,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:20,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 23:27:20,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:27:20,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 23:27:20,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:20,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:20,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 23:27:20,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:27:20,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:20,855 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:27:20,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:20,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:20,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:20,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:20,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:27:20,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:20,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:20,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87984292] [2020-10-27 23:27:20,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:20,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:20,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486340072] [2020-10-27 23:27:20,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:20,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:20,921 INFO L87 Difference]: Start difference. First operand 978 states and 1438 transitions. Second operand 4 states. [2020-10-27 23:27:23,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:23,759 INFO L93 Difference]: Finished difference Result 2882 states and 4236 transitions. [2020-10-27 23:27:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:27:23,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-10-27 23:27:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:23,773 INFO L225 Difference]: With dead ends: 2882 [2020-10-27 23:27:23,773 INFO L226 Difference]: Without dead ends: 1932 [2020-10-27 23:27:23,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2020-10-27 23:27:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 980. [2020-10-27 23:27:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2020-10-27 23:27:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1440 transitions. [2020-10-27 23:27:23,858 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1440 transitions. Word has length 152 [2020-10-27 23:27:23,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:23,858 INFO L481 AbstractCegarLoop]: Abstraction has 980 states and 1440 transitions. [2020-10-27 23:27:23,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1440 transitions. [2020-10-27 23:27:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 23:27:23,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:23,865 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:23,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:27:23,865 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:23,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:23,866 INFO L82 PathProgramCache]: Analyzing trace with hash 628949954, now seen corresponding path program 1 times [2020-10-27 23:27:23,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:23,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842519308] [2020-10-27 23:27:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:23,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:25,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:25,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:26,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:26,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:28,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 23:27:28,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:27:28,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 23:27:28,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:28,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:28,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:27:28,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:27:28,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:29,439 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:27:29,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:29,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:29,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:29,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:29,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:29,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:27:29,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:29,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:29,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:29,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:29,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:29,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842519308] [2020-10-27 23:27:29,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:29,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:29,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733864235] [2020-10-27 23:27:29,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:29,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:29,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:29,521 INFO L87 Difference]: Start difference. First operand 980 states and 1440 transitions. Second operand 4 states. [2020-10-27 23:27:31,683 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 23:27:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:32,542 INFO L93 Difference]: Finished difference Result 2528 states and 3723 transitions. [2020-10-27 23:27:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:32,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-10-27 23:27:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:32,557 INFO L225 Difference]: With dead ends: 2528 [2020-10-27 23:27:32,558 INFO L226 Difference]: Without dead ends: 1710 [2020-10-27 23:27:32,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2020-10-27 23:27:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1707. [2020-10-27 23:27:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-10-27 23:27:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2473 transitions. [2020-10-27 23:27:32,670 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2473 transitions. Word has length 153 [2020-10-27 23:27:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:32,670 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2473 transitions. [2020-10-27 23:27:32,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2473 transitions. [2020-10-27 23:27:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 23:27:32,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:32,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:32,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:27:32,676 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash 394979141, now seen corresponding path program 1 times [2020-10-27 23:27:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:32,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498115130] [2020-10-27 23:27:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:32,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:32,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:32,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:32,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:34,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:34,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:34,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:37,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 23:27:37,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:27:37,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 23:27:37,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:27:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 23:27:37,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:27:38,151 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:27:38,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:38,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:38,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:38,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:38,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:38,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:27:38,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:38,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:38,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:38,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:38,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:38,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498115130] [2020-10-27 23:27:38,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:38,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:38,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683933365] [2020-10-27 23:27:38,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:38,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:38,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:38,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:38,219 INFO L87 Difference]: Start difference. First operand 1707 states and 2473 transitions. Second operand 4 states. [2020-10-27 23:27:38,572 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 23:27:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:40,194 INFO L93 Difference]: Finished difference Result 3583 states and 5374 transitions. [2020-10-27 23:27:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:40,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-10-27 23:27:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:40,212 INFO L225 Difference]: With dead ends: 3583 [2020-10-27 23:27:40,212 INFO L226 Difference]: Without dead ends: 2945 [2020-10-27 23:27:40,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:40,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2020-10-27 23:27:40,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2942. [2020-10-27 23:27:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2942 states. [2020-10-27 23:27:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4311 transitions. [2020-10-27 23:27:40,402 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4311 transitions. Word has length 153 [2020-10-27 23:27:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:40,403 INFO L481 AbstractCegarLoop]: Abstraction has 2942 states and 4311 transitions. [2020-10-27 23:27:40,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4311 transitions. [2020-10-27 23:27:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 23:27:40,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:40,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:40,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:27:40,410 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1192687073, now seen corresponding path program 1 times [2020-10-27 23:27:40,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:40,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044773755] [2020-10-27 23:27:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:40,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:40,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:40,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:40,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:40,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:40,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:40,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:41,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:41,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:43,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:43,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:43,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:45,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:45,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 23:27:45,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:27:45,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 23:27:45,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:45,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:45,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:27:45,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:27:45,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:27:45,999 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:27:46,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:46,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:46,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:46,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:46,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:46,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 23:27:46,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:46,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:46,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044773755] [2020-10-27 23:27:46,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:46,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:46,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646931701] [2020-10-27 23:27:46,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:46,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:46,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:46,079 INFO L87 Difference]: Start difference. First operand 2942 states and 4311 transitions. Second operand 5 states. [2020-10-27 23:27:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:47,683 INFO L93 Difference]: Finished difference Result 5302 states and 7797 transitions. [2020-10-27 23:27:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:47,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-27 23:27:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:47,695 INFO L225 Difference]: With dead ends: 5302 [2020-10-27 23:27:47,695 INFO L226 Difference]: Without dead ends: 2512 [2020-10-27 23:27:47,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:27:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2020-10-27 23:27:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2512. [2020-10-27 23:27:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2512 states. [2020-10-27 23:27:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3681 transitions. [2020-10-27 23:27:47,834 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3681 transitions. Word has length 153 [2020-10-27 23:27:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:47,835 INFO L481 AbstractCegarLoop]: Abstraction has 2512 states and 3681 transitions. [2020-10-27 23:27:47,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3681 transitions. [2020-10-27 23:27:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 23:27:47,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:47,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:47,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:27:47,841 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:47,842 INFO L82 PathProgramCache]: Analyzing trace with hash 621452143, now seen corresponding path program 1 times [2020-10-27 23:27:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:47,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140691362] [2020-10-27 23:27:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:47,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:47,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:49,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:49,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:49,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:52,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:52,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:52,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:52,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:52,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 23:27:52,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:27:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:27:52,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:52,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-27 23:27:52,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 23:27:52,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:53,326 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:27:53,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:53,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:53,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:53,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:53,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:53,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 23:27:53,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:53,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:53,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:53,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140691362] [2020-10-27 23:27:53,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:53,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:53,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182908567] [2020-10-27 23:27:53,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:53,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:53,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:53,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:53,438 INFO L87 Difference]: Start difference. First operand 2512 states and 3681 transitions. Second operand 4 states. [2020-10-27 23:27:53,804 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 23:27:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:55,639 INFO L93 Difference]: Finished difference Result 6914 states and 10198 transitions. [2020-10-27 23:27:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:55,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-10-27 23:27:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:55,662 INFO L225 Difference]: With dead ends: 6914 [2020-10-27 23:27:55,662 INFO L226 Difference]: Without dead ends: 4791 [2020-10-27 23:27:55,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2020-10-27 23:27:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 4788. [2020-10-27 23:27:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4788 states. [2020-10-27 23:27:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 6989 transitions. [2020-10-27 23:27:55,942 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 6989 transitions. Word has length 159 [2020-10-27 23:27:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:55,942 INFO L481 AbstractCegarLoop]: Abstraction has 4788 states and 6989 transitions. [2020-10-27 23:27:55,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 6989 transitions. [2020-10-27 23:27:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 23:27:55,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:55,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:55,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:27:55,952 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1753574742, now seen corresponding path program 1 times [2020-10-27 23:27:55,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:55,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527291356] [2020-10-27 23:27:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:56,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:56,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:56,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:56,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:56,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:56,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:56,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:56,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:56,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:58,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:58,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:01,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:01,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 23:28:01,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:28:01,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 23:28:01,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:01,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:28:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 23:28:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 23:28:01,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:01,809 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:28:01,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:01,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:01,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:01,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:01,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:28:01,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:02,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527291356] [2020-10-27 23:28:02,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:02,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:28:02,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579194498] [2020-10-27 23:28:02,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:28:02,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:02,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:28:02,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:28:02,037 INFO L87 Difference]: Start difference. First operand 4788 states and 6989 transitions. Second operand 12 states. [2020-10-27 23:28:02,219 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-27 23:28:03,339 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 258 DAG size of output: 246 [2020-10-27 23:28:06,331 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-10-27 23:28:08,673 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-27 23:28:11,505 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-27 23:28:16,020 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-27 23:28:18,710 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-27 23:28:29,660 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-27 23:29:11,351 WARN L193 SmtUtils]: Spent 4.68 s on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 23:29:11,797 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 23:29:19,179 WARN L193 SmtUtils]: Spent 7.24 s on a formula simplification. DAG size of input: 232 DAG size of output: 220 [2020-10-27 23:30:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:36,255 INFO L93 Difference]: Finished difference Result 12648 states and 19163 transitions. [2020-10-27 23:30:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 23:30:36,256 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 159 [2020-10-27 23:30:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:36,307 INFO L225 Difference]: With dead ends: 12648 [2020-10-27 23:30:36,307 INFO L226 Difference]: Without dead ends: 10919 [2020-10-27 23:30:36,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=185, Invalid=739, Unknown=6, NotChecked=0, Total=930 [2020-10-27 23:30:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10919 states. [2020-10-27 23:30:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10919 to 5428. [2020-10-27 23:30:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5428 states. [2020-10-27 23:30:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 7796 transitions. [2020-10-27 23:30:36,768 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 7796 transitions. Word has length 159 [2020-10-27 23:30:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:30:36,769 INFO L481 AbstractCegarLoop]: Abstraction has 5428 states and 7796 transitions. [2020-10-27 23:30:36,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:30:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 7796 transitions. [2020-10-27 23:30:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 23:30:36,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:30:36,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:30:36,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:30:36,780 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:30:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:30:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash -213764073, now seen corresponding path program 1 times [2020-10-27 23:30:36,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:30:36,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708938237] [2020-10-27 23:30:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:30:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:36,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:36,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:37,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:38,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:39,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:40,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:40,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:40,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:41,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:41,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 23:30:41,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:30:41,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 23:30:41,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:41,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:30:41,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:30:41,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 23:30:41,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:42,256 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:30:42,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:42,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:42,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:42,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:42,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:42,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:30:42,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:42,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:30:42,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708938237] [2020-10-27 23:30:42,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:42,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:30:42,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805915426] [2020-10-27 23:30:42,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:30:42,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:30:42,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:30:42,335 INFO L87 Difference]: Start difference. First operand 5428 states and 7796 transitions. Second operand 5 states.