/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:24:03,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:24:03,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:24:03,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:24:03,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:24:03,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:24:03,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:24:03,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:24:03,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:24:03,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:24:03,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:24:03,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:24:03,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:24:03,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:24:03,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:24:03,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:24:03,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:24:03,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:24:03,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:24:03,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:24:03,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:24:03,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:24:03,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:24:03,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:24:03,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:24:03,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:24:03,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:24:03,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:24:03,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:24:03,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:24:03,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:24:03,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:24:03,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:24:03,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:24:03,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:24:03,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:24:03,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:24:03,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:24:03,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:24:03,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:24:03,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:24:03,270 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 19:24:03,321 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:24:03,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:24:03,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:24:03,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:24:03,326 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:24:03,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:24:03,327 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:24:03,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:24:03,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:24:03,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:24:03,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:24:03,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:24:03,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:24:03,329 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:24:03,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:24:03,329 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:24:03,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:24:03,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:24:03,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:24:03,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:24:03,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:24:03,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:24:03,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:24:03,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:24:03,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:24:03,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:24:03,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:24:03,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:24:03,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:24:03,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:24:03,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:24:03,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:24:03,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:24:03,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:24:03,777 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:24:03,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:24:03,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dafdea41e/fe6ae60c12f24311a5e2bfc960164341/FLAG604f8851d [2020-10-28 19:24:04,621 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:24:04,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:24:04,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dafdea41e/fe6ae60c12f24311a5e2bfc960164341/FLAG604f8851d [2020-10-28 19:24:04,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dafdea41e/fe6ae60c12f24311a5e2bfc960164341 [2020-10-28 19:24:04,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:24:04,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:24:04,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:24:04,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:24:04,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:24:04,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:24:04" (1/1) ... [2020-10-28 19:24:04,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2347a790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:04, skipping insertion in model container [2020-10-28 19:24:04,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:24:04" (1/1) ... [2020-10-28 19:24:04,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:24:04,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:24:05,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:24:05,557 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:24:05,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:24:05,758 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:24:05,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05 WrapperNode [2020-10-28 19:24:05,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:24:05,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:24:05,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:24:05,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:24:05,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05" (1/1) ... [2020-10-28 19:24:05,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05" (1/1) ... [2020-10-28 19:24:05,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05" (1/1) ... [2020-10-28 19:24:05,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05" (1/1) ... [2020-10-28 19:24:05,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05" (1/1) ... [2020-10-28 19:24:05,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05" (1/1) ... [2020-10-28 19:24:05,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05" (1/1) ... [2020-10-28 19:24:05,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:24:05,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:24:05,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:24:05,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:24:05,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:24:05,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:24:05,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:24:05,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:24:05,952 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:24:05,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:24:05,953 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:24:05,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:24:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:24:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:24:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:24:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:24:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:24:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:24:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:24:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:24:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:24:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:24:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:24:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:24:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:24:05,958 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:24:05,958 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:24:05,958 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:24:05,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:24:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:24:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:24:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:24:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:24:05,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:24:07,335 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:24:07,335 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:24:07,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:24:07 BoogieIcfgContainer [2020-10-28 19:24:07,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:24:07,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:24:07,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:24:07,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:24:07,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:24:04" (1/3) ... [2020-10-28 19:24:07,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305cb3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:24:07, skipping insertion in model container [2020-10-28 19:24:07,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:05" (2/3) ... [2020-10-28 19:24:07,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305cb3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:24:07, skipping insertion in model container [2020-10-28 19:24:07,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:24:07" (3/3) ... [2020-10-28 19:24:07,347 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:24:07,360 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:24:07,366 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:24:07,380 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:24:07,410 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:24:07,410 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:24:07,411 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:24:07,411 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:24:07,411 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:24:07,411 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:24:07,411 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:24:07,411 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:24:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states. [2020-10-28 19:24:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 19:24:07,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:07,459 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] [2020-10-28 19:24:07,460 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:07,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash -59655128, now seen corresponding path program 1 times [2020-10-28 19:24:07,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:07,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803737878] [2020-10-28 19:24:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:08,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:08,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:08,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:09,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:10,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:12,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:12,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 19:24:12,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:24:12,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 19:24:12,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:12,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:12,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:24:12,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 19:24:12,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 19:24:12,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:24:13,764 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:24:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:13,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:13,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:13,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:13,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:13,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 19:24:13,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:13,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:13,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:13,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:13,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:13,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:13,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803737878] [2020-10-28 19:24:13,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:13,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:24:13,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615964011] [2020-10-28 19:24:13,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:24:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:13,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:24:13,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:24:13,920 INFO L87 Difference]: Start difference. First operand 360 states. Second operand 4 states. [2020-10-28 19:24:14,546 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 19:24:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:16,994 INFO L93 Difference]: Finished difference Result 670 states and 1149 transitions. [2020-10-28 19:24:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:24:17,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-10-28 19:24:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:17,024 INFO L225 Difference]: With dead ends: 670 [2020-10-28 19:24:17,024 INFO L226 Difference]: Without dead ends: 499 [2020-10-28 19:24:17,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-28 19:24:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 495. [2020-10-28 19:24:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-28 19:24:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 817 transitions. [2020-10-28 19:24:17,144 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 817 transitions. Word has length 123 [2020-10-28 19:24:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:17,146 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 817 transitions. [2020-10-28 19:24:17,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:24:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 817 transitions. [2020-10-28 19:24:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 19:24:17,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:17,151 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] [2020-10-28 19:24:17,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:24:17,151 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:17,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1623357087, now seen corresponding path program 1 times [2020-10-28 19:24:17,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:17,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464604342] [2020-10-28 19:24:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:17,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:17,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:18,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:18,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:19,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:20,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:22,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 19:24:22,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:24:22,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 19:24:22,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:22,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 19:24:22,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:22,929 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:24:22,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:22,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:22,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:22,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:22,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:22,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 19:24:22,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:22,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:22,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:22,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:22,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:22,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:23,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464604342] [2020-10-28 19:24:23,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:23,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:24:23,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194818426] [2020-10-28 19:24:23,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:24:23,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:23,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:24:23,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:23,050 INFO L87 Difference]: Start difference. First operand 495 states and 817 transitions. Second operand 5 states. [2020-10-28 19:24:26,193 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 19:24:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:26,354 INFO L93 Difference]: Finished difference Result 1415 states and 2332 transitions. [2020-10-28 19:24:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:26,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-28 19:24:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:26,367 INFO L225 Difference]: With dead ends: 1415 [2020-10-28 19:24:26,368 INFO L226 Difference]: Without dead ends: 955 [2020-10-28 19:24:26,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-10-28 19:24:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 952. [2020-10-28 19:24:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2020-10-28 19:24:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1563 transitions. [2020-10-28 19:24:26,475 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1563 transitions. Word has length 126 [2020-10-28 19:24:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:26,477 INFO L481 AbstractCegarLoop]: Abstraction has 952 states and 1563 transitions. [2020-10-28 19:24:26,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:24:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1563 transitions. [2020-10-28 19:24:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 19:24:26,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:26,494 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] [2020-10-28 19:24:26,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:24:26,494 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:26,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2058412949, now seen corresponding path program 1 times [2020-10-28 19:24:26,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:26,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428892351] [2020-10-28 19:24:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:26,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:28,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:28,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:31,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:31,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 19:24:31,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:24:31,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 19:24:31,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:31,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:31,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:31,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 19:24:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:32,140 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:24:32,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:32,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:32,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:32,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:32,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:32,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:24:32,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:32,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:32,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:32,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:32,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:32,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:32,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428892351] [2020-10-28 19:24:32,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:32,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:24:32,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537365643] [2020-10-28 19:24:32,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:24:32,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:32,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:24:32,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:32,245 INFO L87 Difference]: Start difference. First operand 952 states and 1563 transitions. Second operand 5 states. [2020-10-28 19:24:35,403 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 19:24:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:35,568 INFO L93 Difference]: Finished difference Result 2722 states and 4456 transitions. [2020-10-28 19:24:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:35,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-28 19:24:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:35,585 INFO L225 Difference]: With dead ends: 2722 [2020-10-28 19:24:35,585 INFO L226 Difference]: Without dead ends: 1859 [2020-10-28 19:24:35,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2020-10-28 19:24:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1856. [2020-10-28 19:24:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1856 states. [2020-10-28 19:24:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 3030 transitions. [2020-10-28 19:24:35,706 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 3030 transitions. Word has length 127 [2020-10-28 19:24:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:35,709 INFO L481 AbstractCegarLoop]: Abstraction has 1856 states and 3030 transitions. [2020-10-28 19:24:35,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:24:35,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 3030 transitions. [2020-10-28 19:24:35,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 19:24:35,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:35,719 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] [2020-10-28 19:24:35,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:24:35,719 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:35,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:35,720 INFO L82 PathProgramCache]: Analyzing trace with hash -991740750, now seen corresponding path program 1 times [2020-10-28 19:24:35,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:35,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426897223] [2020-10-28 19:24:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:35,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:35,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:36,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:36,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:37,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:38,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:40,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 19:24:40,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:24:40,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:24:40,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:40,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 19:24:40,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:41,487 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:24:41,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:41,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:41,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:41,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:41,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:24:41,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:41,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:41,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:41,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:41,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:41,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:41,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426897223] [2020-10-28 19:24:41,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:41,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:24:41,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632880075] [2020-10-28 19:24:41,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:24:41,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:41,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:24:41,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:41,608 INFO L87 Difference]: Start difference. First operand 1856 states and 3030 transitions. Second operand 5 states. [2020-10-28 19:24:45,135 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 19:24:45,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:45,325 INFO L93 Difference]: Finished difference Result 5302 states and 8620 transitions. [2020-10-28 19:24:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:45,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-28 19:24:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:45,348 INFO L225 Difference]: With dead ends: 5302 [2020-10-28 19:24:45,349 INFO L226 Difference]: Without dead ends: 3589 [2020-10-28 19:24:45,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2020-10-28 19:24:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 3586. [2020-10-28 19:24:45,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3586 states. [2020-10-28 19:24:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5816 transitions. [2020-10-28 19:24:45,647 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5816 transitions. Word has length 128 [2020-10-28 19:24:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:45,647 INFO L481 AbstractCegarLoop]: Abstraction has 3586 states and 5816 transitions. [2020-10-28 19:24:45,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:24:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5816 transitions. [2020-10-28 19:24:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 19:24:45,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:45,655 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] [2020-10-28 19:24:45,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:24:45,656 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1293671628, now seen corresponding path program 1 times [2020-10-28 19:24:45,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:45,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868061946] [2020-10-28 19:24:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:45,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:45,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:45,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:46,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:47,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:47,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:48,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:50,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:50,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 19:24:50,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:24:50,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 19:24:50,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:50,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:50,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:24:50,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 19:24:50,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 19:24:50,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:51,256 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:24:51,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:51,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:51,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:51,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:51,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:51,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 19:24:51,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:51,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:51,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:51,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:51,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:51,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:51,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868061946] [2020-10-28 19:24:51,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:51,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:24:51,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348170939] [2020-10-28 19:24:51,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:24:51,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:51,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:24:51,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:24:51,350 INFO L87 Difference]: Start difference. First operand 3586 states and 5816 transitions. Second operand 4 states. [2020-10-28 19:24:51,858 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 19:24:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:54,220 INFO L93 Difference]: Finished difference Result 7872 states and 12948 transitions. [2020-10-28 19:24:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:24:54,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-28 19:24:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:54,254 INFO L225 Difference]: With dead ends: 7872 [2020-10-28 19:24:54,254 INFO L226 Difference]: Without dead ends: 5653 [2020-10-28 19:24:54,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5653 states. [2020-10-28 19:24:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5653 to 5634. [2020-10-28 19:24:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5634 states. [2020-10-28 19:24:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 9200 transitions. [2020-10-28 19:24:54,660 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 9200 transitions. Word has length 129 [2020-10-28 19:24:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:54,660 INFO L481 AbstractCegarLoop]: Abstraction has 5634 states and 9200 transitions. [2020-10-28 19:24:54,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:24:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 9200 transitions. [2020-10-28 19:24:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 19:24:54,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:54,670 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] [2020-10-28 19:24:54,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:24:54,670 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:54,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1405547612, now seen corresponding path program 1 times [2020-10-28 19:24:54,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:54,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441639656] [2020-10-28 19:24:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:54,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:54,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:54,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:58,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:58,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:59,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:59,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:59,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 19:24:59,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:24:59,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:24:59,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:59,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:59,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:59,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:59,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 19:24:59,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:00,322 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:25:00,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:00,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:00,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:00,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:00,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:00,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:25:00,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:00,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:00,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:00,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:00,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:00,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:00,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441639656] [2020-10-28 19:25:00,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:00,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:00,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547472696] [2020-10-28 19:25:00,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:00,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:00,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:00,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:00,444 INFO L87 Difference]: Start difference. First operand 5634 states and 9200 transitions. Second operand 5 states. [2020-10-28 19:25:03,757 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 19:25:04,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:04,144 INFO L93 Difference]: Finished difference Result 16496 states and 26908 transitions. [2020-10-28 19:25:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:04,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-28 19:25:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:04,203 INFO L225 Difference]: With dead ends: 16496 [2020-10-28 19:25:04,203 INFO L226 Difference]: Without dead ends: 11029 [2020-10-28 19:25:04,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11029 states. [2020-10-28 19:25:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11029 to 11026. [2020-10-28 19:25:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11026 states. [2020-10-28 19:25:05,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11026 states to 11026 states and 17932 transitions. [2020-10-28 19:25:05,055 INFO L78 Accepts]: Start accepts. Automaton has 11026 states and 17932 transitions. Word has length 132 [2020-10-28 19:25:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:05,055 INFO L481 AbstractCegarLoop]: Abstraction has 11026 states and 17932 transitions. [2020-10-28 19:25:05,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 11026 states and 17932 transitions. [2020-10-28 19:25:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 19:25:05,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:05,069 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] [2020-10-28 19:25:05,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:25:05,070 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash 124964239, now seen corresponding path program 1 times [2020-10-28 19:25:05,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:05,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662031462] [2020-10-28 19:25:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:05,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:05,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:05,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:05,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:07,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:07,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:07,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:08,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:10,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:10,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 19:25:10,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:25:10,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:25:10,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:10,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:10,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:10,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:10,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-28 19:25:10,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:10,808 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:25:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:10,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:10,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:10,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:10,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:10,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:25:10,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:10,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:10,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:10,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:10,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662031462] [2020-10-28 19:25:10,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:10,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:10,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472573793] [2020-10-28 19:25:10,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:10,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:10,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:10,928 INFO L87 Difference]: Start difference. First operand 11026 states and 17932 transitions. Second operand 5 states. [2020-10-28 19:25:14,502 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 19:25:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:15,283 INFO L93 Difference]: Finished difference Result 31698 states and 51425 transitions. [2020-10-28 19:25:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:15,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-10-28 19:25:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:15,334 INFO L225 Difference]: With dead ends: 31698 [2020-10-28 19:25:15,335 INFO L226 Difference]: Without dead ends: 21463 [2020-10-28 19:25:15,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:15,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21463 states. [2020-10-28 19:25:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21463 to 21460. [2020-10-28 19:25:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21460 states. [2020-10-28 19:25:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21460 states to 21460 states and 34693 transitions. [2020-10-28 19:25:16,895 INFO L78 Accepts]: Start accepts. Automaton has 21460 states and 34693 transitions. Word has length 133 [2020-10-28 19:25:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:16,895 INFO L481 AbstractCegarLoop]: Abstraction has 21460 states and 34693 transitions. [2020-10-28 19:25:16,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 21460 states and 34693 transitions. [2020-10-28 19:25:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-28 19:25:16,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:16,921 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] [2020-10-28 19:25:16,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:25:16,922 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1588656599, now seen corresponding path program 1 times [2020-10-28 19:25:16,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:16,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258627389] [2020-10-28 19:25:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:16,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:17,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:17,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:17,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:18,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:18,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:18,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:19,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:21,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:21,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 19:25:21,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:25:21,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 19:25:21,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:21,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:21,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:21,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:21,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 19:25:21,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:22,535 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:25:22,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:22,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:22,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:22,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:22,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:25:22,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:22,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:22,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:22,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258627389] [2020-10-28 19:25:22,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:22,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:22,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560818414] [2020-10-28 19:25:22,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:22,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:22,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:22,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:22,626 INFO L87 Difference]: Start difference. First operand 21460 states and 34693 transitions. Second operand 5 states. [2020-10-28 19:25:26,839 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 19:25:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:28,619 INFO L93 Difference]: Finished difference Result 61636 states and 99335 transitions. [2020-10-28 19:25:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:28,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-28 19:25:28,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:28,717 INFO L225 Difference]: With dead ends: 61636 [2020-10-28 19:25:28,717 INFO L226 Difference]: Without dead ends: 41733 [2020-10-28 19:25:28,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41733 states. [2020-10-28 19:25:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41733 to 41730. [2020-10-28 19:25:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41730 states. [2020-10-28 19:25:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41730 states to 41730 states and 67015 transitions. [2020-10-28 19:25:32,119 INFO L78 Accepts]: Start accepts. Automaton has 41730 states and 67015 transitions. Word has length 134 [2020-10-28 19:25:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:32,120 INFO L481 AbstractCegarLoop]: Abstraction has 41730 states and 67015 transitions. [2020-10-28 19:25:32,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 41730 states and 67015 transitions. [2020-10-28 19:25:32,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 19:25:32,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:32,164 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] [2020-10-28 19:25:32,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:25:32,165 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:32,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1300652240, now seen corresponding path program 1 times [2020-10-28 19:25:32,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:32,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561701938] [2020-10-28 19:25:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:32,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:32,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:32,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:32,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:32,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:32,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:33,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:37,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 19:25:37,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:25:37,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 19:25:37,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:37,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:37,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:25:37,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 19:25:37,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 19:25:37,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:37,750 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:25:37,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:37,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:37,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:37,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:37,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:25:37,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:37,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:37,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561701938] [2020-10-28 19:25:37,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:37,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:25:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135822990] [2020-10-28 19:25:37,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:25:37,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:37,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:25:37,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:25:37,812 INFO L87 Difference]: Start difference. First operand 41730 states and 67015 transitions. Second operand 4 states. [2020-10-28 19:25:38,337 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 19:25:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:45,491 INFO L93 Difference]: Finished difference Result 103176 states and 167627 transitions. [2020-10-28 19:25:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:25:45,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-10-28 19:25:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:45,669 INFO L225 Difference]: With dead ends: 103176 [2020-10-28 19:25:45,670 INFO L226 Difference]: Without dead ends: 71301 [2020-10-28 19:25:45,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71301 states. [2020-10-28 19:25:51,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71301 to 71042. [2020-10-28 19:25:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71042 states. [2020-10-28 19:25:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71042 states to 71042 states and 114631 transitions. [2020-10-28 19:25:51,677 INFO L78 Accepts]: Start accepts. Automaton has 71042 states and 114631 transitions. Word has length 135 [2020-10-28 19:25:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:51,678 INFO L481 AbstractCegarLoop]: Abstraction has 71042 states and 114631 transitions. [2020-10-28 19:25:51,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:25:51,678 INFO L276 IsEmpty]: Start isEmpty. Operand 71042 states and 114631 transitions. [2020-10-28 19:25:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-28 19:25:51,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:51,709 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] [2020-10-28 19:25:51,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:25:51,710 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:51,710 INFO L82 PathProgramCache]: Analyzing trace with hash -914836221, now seen corresponding path program 1 times [2020-10-28 19:25:51,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:51,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256795716] [2020-10-28 19:25:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:51,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:51,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:51,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:52,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:55,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:56,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 19:25:56,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:25:56,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 19:25:56,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:56,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:56,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:56,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:56,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 19:25:56,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:57,342 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:25:57,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:57,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:57,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:57,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:57,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:57,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:25:57,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:57,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:57,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:57,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:57,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:57,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:57,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256795716] [2020-10-28 19:25:57,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:57,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:57,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736922874] [2020-10-28 19:25:57,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:57,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:57,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:57,403 INFO L87 Difference]: Start difference. First operand 71042 states and 114631 transitions. Second operand 5 states. [2020-10-28 19:26:03,323 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 19:26:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:12,012 INFO L93 Difference]: Finished difference Result 207408 states and 334275 transitions. [2020-10-28 19:26:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:12,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2020-10-28 19:26:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:12,290 INFO L225 Difference]: With dead ends: 207408 [2020-10-28 19:26:12,290 INFO L226 Difference]: Without dead ends: 138669 [2020-10-28 19:26:12,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:26:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138669 states. [2020-10-28 19:26:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138669 to 138666. [2020-10-28 19:26:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138666 states. [2020-10-28 19:26:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138666 states to 138666 states and 222687 transitions. [2020-10-28 19:26:25,047 INFO L78 Accepts]: Start accepts. Automaton has 138666 states and 222687 transitions. Word has length 138 [2020-10-28 19:26:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:25,048 INFO L481 AbstractCegarLoop]: Abstraction has 138666 states and 222687 transitions. [2020-10-28 19:26:25,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 138666 states and 222687 transitions. [2020-10-28 19:26:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 19:26:25,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:25,360 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] [2020-10-28 19:26:25,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:26:25,360 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash 113037459, now seen corresponding path program 1 times [2020-10-28 19:26:25,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:25,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94934145] [2020-10-28 19:26:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:25,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:25,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:25,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:25,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:26,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:26,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:26,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:28,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:28,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:29,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:30,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:30,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:30,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 19:26:30,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:26:30,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 19:26:30,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:30,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:30,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 19:26:30,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:30,970 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:26:30,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:30,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:30,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:30,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:30,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:30,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:26:30,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:30,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:30,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:30,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:30,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:30,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:26:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:26:31,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94934145] [2020-10-28 19:26:31,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:31,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:31,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209217292] [2020-10-28 19:26:31,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:31,068 INFO L87 Difference]: Start difference. First operand 138666 states and 222687 transitions. Second operand 5 states. [2020-10-28 19:26:40,708 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 19:26:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:59,039 INFO L93 Difference]: Finished difference Result 409344 states and 657041 transitions. [2020-10-28 19:26:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:59,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-10-28 19:26:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:59,886 INFO L225 Difference]: With dead ends: 409344 [2020-10-28 19:26:59,886 INFO L226 Difference]: Without dead ends: 270902 [2020-10-28 19:27:00,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:27:00,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270902 states. [2020-10-28 19:27:24,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270902 to 270899. [2020-10-28 19:27:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270899 states. [2020-10-28 19:27:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270899 states to 270899 states and 432790 transitions. [2020-10-28 19:27:25,877 INFO L78 Accepts]: Start accepts. Automaton has 270899 states and 432790 transitions. Word has length 139 [2020-10-28 19:27:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:25,877 INFO L481 AbstractCegarLoop]: Abstraction has 270899 states and 432790 transitions. [2020-10-28 19:27:25,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:27:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 270899 states and 432790 transitions. [2020-10-28 19:27:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-28 19:27:26,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:26,014 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] [2020-10-28 19:27:26,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:27:26,014 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:26,015 INFO L82 PathProgramCache]: Analyzing trace with hash -304141290, now seen corresponding path program 1 times [2020-10-28 19:27:26,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:26,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998904235] [2020-10-28 19:27:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:26,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:26,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:27,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:27,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:27,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:28,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:29,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:29,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:31,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:31,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 19:27:31,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:27:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 19:27:31,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:31,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:27:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:27:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 19:27:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:32,120 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 19:27:32,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:32,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:32,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:32,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:32,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:27:32,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:32,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:32,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:27:32,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998904235] [2020-10-28 19:27:32,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:32,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:27:32,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832955001] [2020-10-28 19:27:32,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:27:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:32,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:27:32,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:27:32,187 INFO L87 Difference]: Start difference. First operand 270899 states and 432790 transitions. Second operand 5 states.