/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.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:27:08,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:27:08,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:27:08,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:27:08,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:27:08,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:27:08,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:27:08,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:27:08,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:27:08,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:27:08,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:27:08,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:27:08,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:27:08,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:27:08,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:27:08,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:27:08,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:27:08,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:27:08,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:27:08,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:27:08,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:27:08,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:27:08,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:27:08,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:27:08,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:27:08,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:27:08,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:27:08,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:27:08,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:27:08,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:27:08,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:27:08,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:27:08,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:27:08,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:27:08,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:27:08,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:27:08,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:27:08,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:27:08,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:27:08,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:27:08,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:27:08,306 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 19:27:08,334 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:27:08,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:27:08,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:27:08,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:27:08,336 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:27:08,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:27:08,337 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:27:08,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:27:08,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:27:08,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:27:08,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:27:08,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:27:08,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:27:08,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:27:08,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:27:08,339 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:27:08,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:27:08,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:27:08,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:27:08,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:27:08,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:27:08,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:27:08,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:27:08,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:27:08,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:27:08,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:27:08,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:27:08,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:27:08,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:27:08,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:27:08,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:27:08,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:27:08,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:27:08,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:27:08,749 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:27:08,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 19:27:08,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4583ad717/9722171eb5cd457f87d19473f11bf043/FLAGd62bc5c1c [2020-10-28 19:27:09,685 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:27:09,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 19:27:09,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4583ad717/9722171eb5cd457f87d19473f11bf043/FLAGd62bc5c1c [2020-10-28 19:27:09,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4583ad717/9722171eb5cd457f87d19473f11bf043 [2020-10-28 19:27:09,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:27:09,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:27:09,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:27:09,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:27:09,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:27:09,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:27:09" (1/1) ... [2020-10-28 19:27:09,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13aa0712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:09, skipping insertion in model container [2020-10-28 19:27:09,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:27:09" (1/1) ... [2020-10-28 19:27:09,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:27:09,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:27:10,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:27:10,740 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:27:10,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:27:11,037 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:27:11,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11 WrapperNode [2020-10-28 19:27:11,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:27:11,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:27:11,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:27:11,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:27:11,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11" (1/1) ... [2020-10-28 19:27:11,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11" (1/1) ... [2020-10-28 19:27:11,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11" (1/1) ... [2020-10-28 19:27:11,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11" (1/1) ... [2020-10-28 19:27:11,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11" (1/1) ... [2020-10-28 19:27:11,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11" (1/1) ... [2020-10-28 19:27:11,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11" (1/1) ... [2020-10-28 19:27:11,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:27:11,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:27:11,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:27:11,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:27:11,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11" (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 19:27:11,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:27:11,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:27:11,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:27:11,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:27:11,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:27:11,325 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:27:11,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:27:11,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:27:11,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:27:11,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:27:11,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:27:11,327 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:27:11,327 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:27:11,327 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:27:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:27:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:27:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:27:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:27:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:27:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:27:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:27:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:27:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:27:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:27:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:27:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:27:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:27:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:27:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:27:15,227 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:27:15,228 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:27:15,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:27:15 BoogieIcfgContainer [2020-10-28 19:27:15,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:27:15,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:27:15,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:27:15,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:27:15,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:27:09" (1/3) ... [2020-10-28 19:27:15,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12193c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:27:15, skipping insertion in model container [2020-10-28 19:27:15,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:27:11" (2/3) ... [2020-10-28 19:27:15,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12193c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:27:15, skipping insertion in model container [2020-10-28 19:27:15,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:27:15" (3/3) ... [2020-10-28 19:27:15,242 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 19:27:15,254 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:27:15,260 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:27:15,275 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:27:15,310 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:27:15,310 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:27:15,311 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:27:15,311 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:27:15,311 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:27:15,311 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:27:15,311 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:27:15,311 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:27:15,375 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states. [2020-10-28 19:27:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-28 19:27:15,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:15,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:15,410 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash 48007832, now seen corresponding path program 1 times [2020-10-28 19:27:15,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:15,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195497489] [2020-10-28 19:27:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:16,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:19,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:21,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:21,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-28 19:27:21,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:27:21,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:27:21,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:21,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:21,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:27:21,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-28 19:27:21,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 19:27:21,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:27:23,748 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:27:23,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:23,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:23,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:23,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:23,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:23,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 19:27:23,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:23,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:23,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:27:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:27:24,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195497489] [2020-10-28 19:27:24,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:24,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:27:24,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521221670] [2020-10-28 19:27:24,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:27:24,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:27:24,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:27:24,062 INFO L87 Difference]: Start difference. First operand 779 states. Second operand 4 states. [2020-10-28 19:27:26,552 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 414 [2020-10-28 19:27:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:34,510 INFO L93 Difference]: Finished difference Result 1215 states and 2158 transitions. [2020-10-28 19:27:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:27:34,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 218 [2020-10-28 19:27:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:34,549 INFO L225 Difference]: With dead ends: 1215 [2020-10-28 19:27:34,549 INFO L226 Difference]: Without dead ends: 980 [2020-10-28 19:27:34,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:27:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-10-28 19:27:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 977. [2020-10-28 19:27:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2020-10-28 19:27:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1695 transitions. [2020-10-28 19:27:34,709 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1695 transitions. Word has length 218 [2020-10-28 19:27:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:34,717 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 1695 transitions. [2020-10-28 19:27:34,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:27:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1695 transitions. [2020-10-28 19:27:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-28 19:27:34,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:34,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:34,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:27:34,736 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:34,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2000592653, now seen corresponding path program 1 times [2020-10-28 19:27:34,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:34,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660590155] [2020-10-28 19:27:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:35,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:35,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:36,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:36,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:37,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:38,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:39,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:39,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:39,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-28 19:27:39,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:27:39,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-28 19:27:39,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:39,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:39,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:27:39,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:27:39,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 208 [2020-10-28 19:27:39,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:27:42,454 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:27:42,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:42,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:42,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:42,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:42,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:42,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 19:27:42,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:42,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:42,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:42,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:42,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:42,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:42,756 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 19:27:42,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660590155] [2020-10-28 19:27:42,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:42,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:27:42,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166431585] [2020-10-28 19:27:42,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:27:42,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:42,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:27:42,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:27:42,761 INFO L87 Difference]: Start difference. First operand 977 states and 1695 transitions. Second operand 5 states. [2020-10-28 19:27:54,821 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:27:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:55,027 INFO L93 Difference]: Finished difference Result 2812 states and 4872 transitions. [2020-10-28 19:27:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:27:55,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2020-10-28 19:27:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:55,048 INFO L225 Difference]: With dead ends: 2812 [2020-10-28 19:27:55,048 INFO L226 Difference]: Without dead ends: 1920 [2020-10-28 19:27:55,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:27:55,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-10-28 19:27:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1917. [2020-10-28 19:27:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-10-28 19:27:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 3314 transitions. [2020-10-28 19:27:55,201 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 3314 transitions. Word has length 222 [2020-10-28 19:27:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:55,204 INFO L481 AbstractCegarLoop]: Abstraction has 1917 states and 3314 transitions. [2020-10-28 19:27:55,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:27:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 3314 transitions. [2020-10-28 19:27:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 19:27:55,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:55,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:55,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:27:55,213 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1873925416, now seen corresponding path program 1 times [2020-10-28 19:27:55,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:55,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617916204] [2020-10-28 19:27:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:55,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:56,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:56,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:57,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:57,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:58,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:59,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:59,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:00,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:00,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 19:28:00,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:28:00,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-28 19:28:00,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:00,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:00,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:28:00,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:28:00,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-28 19:28:00,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:28:03,044 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:28:03,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:03,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:03,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:03,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:03,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:03,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 19:28:03,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:03,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:03,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:03,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:03,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:03,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:03,389 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 19:28:03,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617916204] [2020-10-28 19:28:03,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:03,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:28:03,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751123223] [2020-10-28 19:28:03,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:28:03,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:28:03,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:28:03,394 INFO L87 Difference]: Start difference. First operand 1917 states and 3314 transitions. Second operand 5 states. [2020-10-28 19:28:15,640 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:28:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:15,864 INFO L93 Difference]: Finished difference Result 5568 states and 9612 transitions. [2020-10-28 19:28:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:28:15,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2020-10-28 19:28:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:15,886 INFO L225 Difference]: With dead ends: 5568 [2020-10-28 19:28:15,886 INFO L226 Difference]: Without dead ends: 3760 [2020-10-28 19:28:15,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:28:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2020-10-28 19:28:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3757. [2020-10-28 19:28:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3757 states. [2020-10-28 19:28:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 6472 transitions. [2020-10-28 19:28:16,137 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 6472 transitions. Word has length 223 [2020-10-28 19:28:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:16,138 INFO L481 AbstractCegarLoop]: Abstraction has 3757 states and 6472 transitions. [2020-10-28 19:28:16,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:28:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 6472 transitions. [2020-10-28 19:28:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 19:28:16,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:16,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:28:16,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:28:16,149 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash -927531192, now seen corresponding path program 1 times [2020-10-28 19:28:16,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:16,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159232810] [2020-10-28 19:28:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:16,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:16,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:17,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:17,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:17,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:19,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:19,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:19,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:20,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:21,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:21,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 19:28:21,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:28:21,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-28 19:28:21,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:21,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:28:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:28:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-28 19:28:21,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:23,718 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:28:23,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:23,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:23,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:23,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:23,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:23,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 19:28:23,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:23,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:23,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:23,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:23,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:23,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:24,001 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 19:28:24,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159232810] [2020-10-28 19:28:24,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:24,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:28:24,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24727228] [2020-10-28 19:28:24,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:28:24,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:24,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:28:24,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:28:24,010 INFO L87 Difference]: Start difference. First operand 3757 states and 6472 transitions. Second operand 5 states. [2020-10-28 19:28:35,609 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:28:35,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:35,851 INFO L93 Difference]: Finished difference Result 10933 states and 18804 transitions. [2020-10-28 19:28:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:28:35,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2020-10-28 19:28:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:35,893 INFO L225 Difference]: With dead ends: 10933 [2020-10-28 19:28:35,893 INFO L226 Difference]: Without dead ends: 7381 [2020-10-28 19:28:35,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:28:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2020-10-28 19:28:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 7378. [2020-10-28 19:28:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7378 states. [2020-10-28 19:28:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 12664 transitions. [2020-10-28 19:28:36,472 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 12664 transitions. Word has length 223 [2020-10-28 19:28:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:36,473 INFO L481 AbstractCegarLoop]: Abstraction has 7378 states and 12664 transitions. [2020-10-28 19:28:36,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:28:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 12664 transitions. [2020-10-28 19:28:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-28 19:28:36,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:36,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:28:36,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:28:36,490 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:36,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1622238405, now seen corresponding path program 1 times [2020-10-28 19:28:36,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:36,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129491389] [2020-10-28 19:28:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:36,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:37,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:38,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:38,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:39,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:40,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:40,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:41,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:41,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:41,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 19:28:41,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:28:41,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-28 19:28:41,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:41,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:28:41,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:28:41,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-28 19:28:41,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:44,104 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:28:44,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:44,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:44,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:44,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:44,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:44,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 19:28:44,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:44,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:44,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:44,294 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 19:28:44,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129491389] [2020-10-28 19:28:44,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:44,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:28:44,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152785490] [2020-10-28 19:28:44,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:28:44,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:44,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:28:44,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:28:44,297 INFO L87 Difference]: Start difference. First operand 7378 states and 12664 transitions. Second operand 5 states. [2020-10-28 19:28:55,983 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:28:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:56,301 INFO L93 Difference]: Finished difference Result 21744 states and 37286 transitions. [2020-10-28 19:28:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:28:56,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-10-28 19:28:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:56,374 INFO L225 Difference]: With dead ends: 21744 [2020-10-28 19:28:56,374 INFO L226 Difference]: Without dead ends: 14571 [2020-10-28 19:28:56,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:28:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2020-10-28 19:28:57,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 14568. [2020-10-28 19:28:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14568 states. [2020-10-28 19:28:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14568 states to 14568 states and 24880 transitions. [2020-10-28 19:28:57,640 INFO L78 Accepts]: Start accepts. Automaton has 14568 states and 24880 transitions. Word has length 224 [2020-10-28 19:28:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:57,641 INFO L481 AbstractCegarLoop]: Abstraction has 14568 states and 24880 transitions. [2020-10-28 19:28:57,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:28:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 14568 states and 24880 transitions. [2020-10-28 19:28:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-28 19:28:57,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:57,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:28:57,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:28:57,674 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:57,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1059594319, now seen corresponding path program 1 times [2020-10-28 19:28:57,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:57,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062434373] [2020-10-28 19:28:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:57,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:57,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:59,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:59,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:59,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:00,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:01,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:02,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:02,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:02,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 19:29:02,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:29:02,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:29:02,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:02,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:29:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:29:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-28 19:29:02,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:05,345 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:29:05,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:29:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:05,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:05,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:05,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:29:05,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:29:05,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 19:29:05,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:05,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:29:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:29:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:29:05,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:05,532 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 19:29:05,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062434373] [2020-10-28 19:29:05,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:29:05,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:29:05,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507692309] [2020-10-28 19:29:05,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:29:05,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:29:05,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:29:05,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:29:05,535 INFO L87 Difference]: Start difference. First operand 14568 states and 24880 transitions. Second operand 5 states. [2020-10-28 19:29:17,995 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:29:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:29:18,615 INFO L93 Difference]: Finished difference Result 42182 states and 71892 transitions. [2020-10-28 19:29:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:29:18,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-10-28 19:29:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:29:18,689 INFO L225 Difference]: With dead ends: 42182 [2020-10-28 19:29:18,689 INFO L226 Difference]: Without dead ends: 28731 [2020-10-28 19:29:18,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:29:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28731 states. [2020-10-28 19:29:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28731 to 28728. [2020-10-28 19:29:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28728 states. [2020-10-28 19:29:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28728 states to 28728 states and 48880 transitions. [2020-10-28 19:29:20,980 INFO L78 Accepts]: Start accepts. Automaton has 28728 states and 48880 transitions. Word has length 224 [2020-10-28 19:29:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:29:20,981 INFO L481 AbstractCegarLoop]: Abstraction has 28728 states and 48880 transitions. [2020-10-28 19:29:20,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:29:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 28728 states and 48880 transitions. [2020-10-28 19:29:21,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 19:29:21,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:29:21,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:29:21,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:29:21,053 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:29:21,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:29:21,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1866560779, now seen corresponding path program 1 times [2020-10-28 19:29:21,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:29:21,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560421813] [2020-10-28 19:29:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:29:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:21,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:21,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:21,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:22,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:22,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:22,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:23,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:24,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:25,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:26,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:26,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 19:29:26,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:29:26,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 19:29:26,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:26,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:26,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:29:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:29:26,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-28 19:29:26,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:28,515 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:29:28,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:29:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:28,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:28,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:28,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:29:28,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:29:28,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 19:29:28,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:28,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:28,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:29:28,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:29:28,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:29:28,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:28,713 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 19:29:28,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560421813] [2020-10-28 19:29:28,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:29:28,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:29:28,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314565660] [2020-10-28 19:29:28,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:29:28,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:29:28,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:29:28,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:29:28,716 INFO L87 Difference]: Start difference. First operand 28728 states and 48880 transitions. Second operand 5 states. [2020-10-28 19:29:42,413 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:29:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:29:43,496 INFO L93 Difference]: Finished difference Result 82806 states and 140484 transitions. [2020-10-28 19:29:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:29:43,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-10-28 19:29:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:29:43,637 INFO L225 Difference]: With dead ends: 82806 [2020-10-28 19:29:43,637 INFO L226 Difference]: Without dead ends: 56075 [2020-10-28 19:29:43,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:29:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56075 states. [2020-10-28 19:29:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56075 to 56072. [2020-10-28 19:29:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56072 states. [2020-10-28 19:29:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56072 states to 56072 states and 94824 transitions. [2020-10-28 19:29:48,304 INFO L78 Accepts]: Start accepts. Automaton has 56072 states and 94824 transitions. Word has length 225 [2020-10-28 19:29:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:29:48,304 INFO L481 AbstractCegarLoop]: Abstraction has 56072 states and 94824 transitions. [2020-10-28 19:29:48,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:29:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 56072 states and 94824 transitions. [2020-10-28 19:29:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 19:29:48,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:29:48,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:29:48,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:29:48,383 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:29:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:29:48,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1172585249, now seen corresponding path program 1 times [2020-10-28 19:29:48,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:29:48,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827687691] [2020-10-28 19:29:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:29:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:48,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:48,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:48,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:49,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:49,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:50,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:50,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:51,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:52,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:53,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:53,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 19:29:53,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:29:53,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-28 19:29:53,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:53,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:29:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:29:53,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-28 19:29:53,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:55,906 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:29:55,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:29:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:55,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:55,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:55,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:29:55,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:29:55,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:29:55,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:55,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:55,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:29:55,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:29:55,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:29:55,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:56,047 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 19:29:56,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827687691] [2020-10-28 19:29:56,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:29:56,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:29:56,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933095571] [2020-10-28 19:29:56,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:29:56,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:29:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:29:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:29:56,049 INFO L87 Difference]: Start difference. First operand 56072 states and 94824 transitions. Second operand 5 states. [2020-10-28 19:30:11,547 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:30:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:30:13,496 INFO L93 Difference]: Finished difference Result 164102 states and 277156 transitions. [2020-10-28 19:30:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:30:13,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-10-28 19:30:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:30:13,974 INFO L225 Difference]: With dead ends: 164102 [2020-10-28 19:30:13,974 INFO L226 Difference]: Without dead ends: 109411 [2020-10-28 19:30:14,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:30:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109411 states. [2020-10-28 19:30:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109411 to 109408. [2020-10-28 19:30:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109408 states. [2020-10-28 19:30:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109408 states to 109408 states and 183944 transitions. [2020-10-28 19:30:22,762 INFO L78 Accepts]: Start accepts. Automaton has 109408 states and 183944 transitions. Word has length 225 [2020-10-28 19:30:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:30:22,762 INFO L481 AbstractCegarLoop]: Abstraction has 109408 states and 183944 transitions. [2020-10-28 19:30:22,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:30:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 109408 states and 183944 transitions. [2020-10-28 19:30:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 19:30:23,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:30:23,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:30:23,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:30:23,222 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:30:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:30:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash -164605835, now seen corresponding path program 1 times [2020-10-28 19:30:23,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:30:23,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060900795] [2020-10-28 19:30:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:30:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:30:23,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:23,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:23,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:24,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:24,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:24,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:26,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:26,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:27,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:28,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:30:28,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-28 19:30:28,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:30:28,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:30:28,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:30:28,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:30:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:30:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 150 [2020-10-28 19:30:28,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 19:30:28,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:30:30,632 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:30:30,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:30:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:30:30,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:30:30,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:30:30,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:30:30,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:30:30,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:30:30,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:30:30,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:30:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:30:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:30:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:30:30,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:30:30,709 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 19:30:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060900795] [2020-10-28 19:30:30,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:30:30,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:30:30,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167458668] [2020-10-28 19:30:30,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:30:30,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:30:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:30:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:30:30,711 INFO L87 Difference]: Start difference. First operand 109408 states and 183944 transitions. Second operand 4 states. [2020-10-28 19:30:33,057 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 414