/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=SHALLOWEST --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/eca-rers2012/Problem12_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:56:27,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:56:27,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:56:27,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:56:27,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:56:27,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:56:27,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:56:27,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:56:27,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:56:27,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:56:27,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:56:27,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:56:27,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:56:27,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:56:27,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:56:27,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:56:27,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:56:27,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:56:27,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:56:27,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:56:27,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:56:27,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:56:27,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:56:27,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:56:27,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:56:27,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:56:27,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:56:27,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:56:27,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:56:27,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:56:27,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:56:27,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:56:27,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:56:27,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:56:27,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:56:27,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:56:27,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:56:27,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:56:27,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:56:27,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:56:27,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:56:27,196 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 [2020-10-26 22:56:27,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:56:27,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:56:27,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:56:27,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:56:27,254 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:56:27,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:56:27,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:56:27,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:56:27,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:56:27,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:56:27,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:56:27,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:56:27,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:56:27,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:56:27,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:56:27,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:56:27,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:56:27,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:56:27,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:56:27,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:56:27,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:56:27,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:56:27,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:56:27,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:56:27,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:56:27,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:56:27,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:56:27,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:56:27,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:56:27,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:56:27,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:56:27,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:56:27,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:56:27,764 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:56:27,765 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:56:27,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label40.c [2020-10-26 22:56:27,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/593fcf9ff/abe07e82c3f14478b20b231077d45630/FLAGe7e155328 [2020-10-26 22:56:28,968 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:56:28,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label40.c [2020-10-26 22:56:29,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/593fcf9ff/abe07e82c3f14478b20b231077d45630/FLAGe7e155328 [2020-10-26 22:56:29,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/593fcf9ff/abe07e82c3f14478b20b231077d45630 [2020-10-26 22:56:29,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:56:29,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:56:29,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:56:29,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:56:29,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:56:29,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:56:29" (1/1) ... [2020-10-26 22:56:29,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685e4fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:29, skipping insertion in model container [2020-10-26 22:56:29,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:56:29" (1/1) ... [2020-10-26 22:56:29,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:56:29,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:56:31,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:56:31,161 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:56:31,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:56:31,954 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:56:31,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31 WrapperNode [2020-10-26 22:56:31,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:56:31,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:56:31,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:56:31,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:56:31,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31" (1/1) ... [2020-10-26 22:56:31,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31" (1/1) ... [2020-10-26 22:56:32,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31" (1/1) ... [2020-10-26 22:56:32,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31" (1/1) ... [2020-10-26 22:56:32,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31" (1/1) ... [2020-10-26 22:56:32,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31" (1/1) ... [2020-10-26 22:56:32,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31" (1/1) ... [2020-10-26 22:56:32,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:56:32,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:56:32,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:56:32,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:56:32,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31" (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 [2020-10-26 22:56:32,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:56:32,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:56:32,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:56:32,394 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:56:32,394 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:56:32,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:56:32,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:56:32,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:56:32,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:56:32,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:56:32,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:56:32,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:56:32,396 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:56:32,396 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:56:32,396 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:56:32,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:56:32,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:56:32,396 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:56:32,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:56:32,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:56:32,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:56:32,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:56:32,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:56:32,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:56:32,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:56:38,721 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:56:38,722 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:56:38,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:56:38 BoogieIcfgContainer [2020-10-26 22:56:38,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:56:38,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:56:38,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:56:38,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:56:38,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:56:29" (1/3) ... [2020-10-26 22:56:38,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bca3ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:56:38, skipping insertion in model container [2020-10-26 22:56:38,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:31" (2/3) ... [2020-10-26 22:56:38,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bca3ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:56:38, skipping insertion in model container [2020-10-26 22:56:38,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:56:38" (3/3) ... [2020-10-26 22:56:38,737 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label40.c [2020-10-26 22:56:38,751 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:56:38,758 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:56:38,773 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:56:38,809 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:56:38,810 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:56:38,810 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:56:38,810 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:56:38,810 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:56:38,810 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:56:38,810 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:56:38,811 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:56:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:56:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 22:56:38,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:38,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:56:38,860 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:38,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:38,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1620225892, now seen corresponding path program 1 times [2020-10-26 22:56:38,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:38,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010403787] [2020-10-26 22:56:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:39,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:39,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:39,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 22:56:39,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:39,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-26 22:56:39,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 22:56:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:56:39,712 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:56:39,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:39,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:39,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:39,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:39,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:39,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 22:56:39,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:39,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:39,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:39,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010403787] [2020-10-26 22:56:39,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:39,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 22:56:39,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802356779] [2020-10-26 22:56:39,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:56:39,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:56:39,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:56:39,820 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 5 states. [2020-10-26 22:56:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:55,503 INFO L93 Difference]: Finished difference Result 3258 states and 6300 transitions. [2020-10-26 22:56:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:56:55,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-26 22:56:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:55,557 INFO L225 Difference]: With dead ends: 3258 [2020-10-26 22:56:55,558 INFO L226 Difference]: Without dead ends: 2347 [2020-10-26 22:56:55,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:56:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2020-10-26 22:56:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2332. [2020-10-26 22:56:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-26 22:56:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3788 transitions. [2020-10-26 22:56:55,761 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3788 transitions. Word has length 16 [2020-10-26 22:56:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:55,761 INFO L481 AbstractCegarLoop]: Abstraction has 2332 states and 3788 transitions. [2020-10-26 22:56:55,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:56:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3788 transitions. [2020-10-26 22:56:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 22:56:55,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:55,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:56:55,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:56:55,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash -892345062, now seen corresponding path program 1 times [2020-10-26 22:56:55,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:55,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385967610] [2020-10-26 22:56:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:55,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:56,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:56,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 22:56:56,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:56:56,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-26 22:56:56,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:56,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:56:56,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:56,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 22:56:56,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:56,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:56,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:56,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:56,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:56,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:56,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 22:56:56,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:56,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:56,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:56,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:56,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:56,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:56:56,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:56,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 22:56:56,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:56:56,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:56:56,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:56:57,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385967610] [2020-10-26 22:56:57,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:56:57,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:56:57,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870992976] [2020-10-26 22:56:57,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:56:57,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:57,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:56:57,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:56:57,060 INFO L87 Difference]: Start difference. First operand 2332 states and 3788 transitions. Second operand 6 states. [2020-10-26 22:57:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:10,279 INFO L93 Difference]: Finished difference Result 7076 states and 11659 transitions. [2020-10-26 22:57:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:57:10,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-26 22:57:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:10,318 INFO L225 Difference]: With dead ends: 7076 [2020-10-26 22:57:10,318 INFO L226 Difference]: Without dead ends: 4750 [2020-10-26 22:57:10,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:57:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4750 states. [2020-10-26 22:57:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4750 to 4720. [2020-10-26 22:57:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4720 states. [2020-10-26 22:57:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4720 states to 4720 states and 6784 transitions. [2020-10-26 22:57:10,545 INFO L78 Accepts]: Start accepts. Automaton has 4720 states and 6784 transitions. Word has length 91 [2020-10-26 22:57:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:10,546 INFO L481 AbstractCegarLoop]: Abstraction has 4720 states and 6784 transitions. [2020-10-26 22:57:10,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:57:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4720 states and 6784 transitions. [2020-10-26 22:57:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 22:57:10,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:10,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:10,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:57:10,565 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash -710763374, now seen corresponding path program 1 times [2020-10-26 22:57:10,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:10,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535139214] [2020-10-26 22:57:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:10,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:11,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:11,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:11,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 22:57:11,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:57:11,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-10-26 22:57:11,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:57:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 22:57:11,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:11,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:11,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:11,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:11,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:11,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:11,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 22:57:11,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:11,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:11,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:11,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:57:11,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:11,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:11,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:11,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 22:57:11,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:11,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 22:57:11,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:57:11,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:57:12,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535139214] [2020-10-26 22:57:12,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:57:12,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:57:12,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508398959] [2020-10-26 22:57:12,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:57:12,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:57:12,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:57:12,057 INFO L87 Difference]: Start difference. First operand 4720 states and 6784 transitions. Second operand 7 states. [2020-10-26 22:57:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:28,470 INFO L93 Difference]: Finished difference Result 14473 states and 21443 transitions. [2020-10-26 22:57:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:57:28,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-26 22:57:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:28,536 INFO L225 Difference]: With dead ends: 14473 [2020-10-26 22:57:28,536 INFO L226 Difference]: Without dead ends: 9759 [2020-10-26 22:57:28,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:57:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9759 states. [2020-10-26 22:57:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9759 to 9626. [2020-10-26 22:57:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9626 states. [2020-10-26 22:57:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9626 states to 9626 states and 13226 transitions. [2020-10-26 22:57:28,868 INFO L78 Accepts]: Start accepts. Automaton has 9626 states and 13226 transitions. Word has length 95 [2020-10-26 22:57:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:28,869 INFO L481 AbstractCegarLoop]: Abstraction has 9626 states and 13226 transitions. [2020-10-26 22:57:28,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 9626 states and 13226 transitions. [2020-10-26 22:57:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-26 22:57:28,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:28,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:28,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:57:28,872 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1065231374, now seen corresponding path program 1 times [2020-10-26 22:57:28,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:28,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975838611] [2020-10-26 22:57:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:28,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:30,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:30,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-26 22:57:30,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:57:30,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328 [2020-10-26 22:57:30,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:57:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-26 22:57:30,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:30,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:30,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:30,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:30,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:30,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:30,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:57:30,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:30,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:30,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:30,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:57:30,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:30,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:30,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:30,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:30,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:57:30,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:30,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-26 22:57:30,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:57:30,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:57:30,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975838611] [2020-10-26 22:57:30,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:57:30,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 22:57:30,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728897497] [2020-10-26 22:57:30,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:57:30,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:30,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:57:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:57:30,917 INFO L87 Difference]: Start difference. First operand 9626 states and 13226 transitions. Second operand 8 states. [2020-10-26 22:57:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:55,623 INFO L93 Difference]: Finished difference Result 37827 states and 54800 transitions. [2020-10-26 22:57:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 22:57:55,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2020-10-26 22:57:55,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:55,812 INFO L225 Difference]: With dead ends: 37827 [2020-10-26 22:57:55,812 INFO L226 Difference]: Without dead ends: 28207 [2020-10-26 22:57:55,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 22:57:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28207 states. [2020-10-26 22:57:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28207 to 25808. [2020-10-26 22:57:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25808 states. [2020-10-26 22:57:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25808 states to 25808 states and 34935 transitions. [2020-10-26 22:57:56,800 INFO L78 Accepts]: Start accepts. Automaton has 25808 states and 34935 transitions. Word has length 129 [2020-10-26 22:57:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:56,801 INFO L481 AbstractCegarLoop]: Abstraction has 25808 states and 34935 transitions. [2020-10-26 22:57:56,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:57:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 25808 states and 34935 transitions. [2020-10-26 22:57:56,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-26 22:57:56,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:56,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:56,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:57:56,806 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:56,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1750443340, now seen corresponding path program 1 times [2020-10-26 22:57:56,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:56,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984536871] [2020-10-26 22:57:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:57,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:58,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:58,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 22:57:58,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:57:58,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-26 22:57:58,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:58,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:58,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:57:58,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:57:58,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:58,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:58,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:58,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:58,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:58,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:58,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:57:58,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:58,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:58,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:58,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:57:58,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:58,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:58,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:59,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:59,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:57:59,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:59,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-26 22:57:59,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:57:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:57:59,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984536871] [2020-10-26 22:57:59,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:57:59,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:57:59,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252674709] [2020-10-26 22:57:59,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:57:59,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:59,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:57:59,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:57:59,565 INFO L87 Difference]: Start difference. First operand 25808 states and 34935 transitions. Second operand 7 states. [2020-10-26 22:58:14,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:58:14,189 INFO L93 Difference]: Finished difference Result 53273 states and 75443 transitions. [2020-10-26 22:58:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:58:14,192 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2020-10-26 22:58:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:58:14,327 INFO L225 Difference]: With dead ends: 53273 [2020-10-26 22:58:14,327 INFO L226 Difference]: Without dead ends: 27471 [2020-10-26 22:58:14,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:58:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27471 states. [2020-10-26 22:58:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27471 to 26989. [2020-10-26 22:58:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26989 states. [2020-10-26 22:58:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26989 states to 26989 states and 36743 transitions. [2020-10-26 22:58:15,630 INFO L78 Accepts]: Start accepts. Automaton has 26989 states and 36743 transitions. Word has length 164 [2020-10-26 22:58:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:58:15,632 INFO L481 AbstractCegarLoop]: Abstraction has 26989 states and 36743 transitions. [2020-10-26 22:58:15,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:58:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 26989 states and 36743 transitions. [2020-10-26 22:58:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-26 22:58:15,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:58:15,639 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:58:15,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:58:15,640 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:58:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:58:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash 518312616, now seen corresponding path program 1 times [2020-10-26 22:58:15,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:58:15,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200405080] [2020-10-26 22:58:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:58:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:15,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:15,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:17,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:17,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-26 22:58:17,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:58:17,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2087 [2020-10-26 22:58:17,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:58:17,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:58:17,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:17,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:17,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:17,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:17,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:17,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:17,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:58:17,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:17,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:17,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:18,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:18,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:18,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:18,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:58:18,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:18,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 22:58:18,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:18,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:18,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:18,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:58:18,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:18,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:58:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:18,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:18,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:18,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:58:18,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:18,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 22:58:18,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:18,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:18,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:58:18,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:58:18,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:58:18,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200405080] [2020-10-26 22:58:18,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:18,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:58:18,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467929205] [2020-10-26 22:58:18,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:58:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:58:18,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:58:18,525 INFO L87 Difference]: Start difference. First operand 26989 states and 36743 transitions. Second operand 7 states. [2020-10-26 22:58:20,123 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 22:58:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:58:41,711 INFO L93 Difference]: Finished difference Result 67549 states and 96840 transitions. [2020-10-26 22:58:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:58:41,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 236 [2020-10-26 22:58:41,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:58:41,861 INFO L225 Difference]: With dead ends: 67549 [2020-10-26 22:58:41,862 INFO L226 Difference]: Without dead ends: 41333 [2020-10-26 22:58:41,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:58:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41333 states. [2020-10-26 22:58:42,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41333 to 41205. [2020-10-26 22:58:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41205 states. [2020-10-26 22:58:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41205 states to 41205 states and 58836 transitions. [2020-10-26 22:58:43,046 INFO L78 Accepts]: Start accepts. Automaton has 41205 states and 58836 transitions. Word has length 236 [2020-10-26 22:58:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:58:43,046 INFO L481 AbstractCegarLoop]: Abstraction has 41205 states and 58836 transitions. [2020-10-26 22:58:43,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:58:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 41205 states and 58836 transitions. [2020-10-26 22:58:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-26 22:58:43,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:58:43,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:58:43,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:58:43,052 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:58:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:58:43,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1213340622, now seen corresponding path program 1 times [2020-10-26 22:58:43,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:58:43,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257981678] [2020-10-26 22:58:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:58:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:43,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:43,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:43,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:45,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:45,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-26 22:58:45,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:58:45,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2455 [2020-10-26 22:58:45,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:45,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:45,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:58:45,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-26 22:58:45,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:45,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:45,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:45,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:45,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:45,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:45,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:58:45,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:45,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:45,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:45,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:45,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:45,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:45,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:45,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:45,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:58:45,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:45,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 22:58:45,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:45,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:45,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:45,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:58:45,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:45,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:58:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:46,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:46,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:46,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:58:46,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:46,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-26 22:58:46,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:46,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:46,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:58:46,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:58:46,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:58:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:58:46,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257981678] [2020-10-26 22:58:46,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:46,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:58:46,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142796604] [2020-10-26 22:58:46,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:58:46,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:46,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:58:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:58:46,626 INFO L87 Difference]: Start difference. First operand 41205 states and 58836 transitions. Second operand 8 states. [2020-10-26 22:58:48,454 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 22:58:54,388 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 22:59:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:59:18,647 INFO L93 Difference]: Finished difference Result 99896 states and 146887 transitions. [2020-10-26 22:59:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 22:59:18,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 239 [2020-10-26 22:59:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:59:18,852 INFO L225 Difference]: With dead ends: 99896 [2020-10-26 22:59:18,852 INFO L226 Difference]: Without dead ends: 54541 [2020-10-26 22:59:19,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 22:59:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54541 states. [2020-10-26 22:59:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54541 to 52877. [2020-10-26 22:59:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52877 states. [2020-10-26 22:59:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52877 states to 52877 states and 70466 transitions. [2020-10-26 22:59:21,019 INFO L78 Accepts]: Start accepts. Automaton has 52877 states and 70466 transitions. Word has length 239 [2020-10-26 22:59:21,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:59:21,020 INFO L481 AbstractCegarLoop]: Abstraction has 52877 states and 70466 transitions. [2020-10-26 22:59:21,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:59:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 52877 states and 70466 transitions. [2020-10-26 22:59:21,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 22:59:21,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:59:21,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:59:21,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:59:21,025 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:59:21,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:59:21,025 INFO L82 PathProgramCache]: Analyzing trace with hash -788859828, now seen corresponding path program 1 times [2020-10-26 22:59:21,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:59:21,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757635884] [2020-10-26 22:59:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:59:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:21,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:21,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:22,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:22,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 22:59:22,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:59:22,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-26 22:59:22,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:22,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:22,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:59:22,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 22:59:22,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:22,691 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:59:22,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:59:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:22,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:22,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:59:22,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:22,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:59:22,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:22,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:22,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:22,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:22,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:22,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:59:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:22,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:22,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:59:22,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:22,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-26 22:59:22,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:22,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:59:22,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:22,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:59:22,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:59:23,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:59:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:23,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:23,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:23,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:59:23,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:23,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 22:59:23,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:23,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:23,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:59:23,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:59:23,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:59:23,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757635884] [2020-10-26 22:59:23,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:59:23,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:59:23,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65297737] [2020-10-26 22:59:23,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:59:23,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:59:23,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:59:23,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:59:23,309 INFO L87 Difference]: Start difference. First operand 52877 states and 70466 transitions. Second operand 7 states. [2020-10-26 22:59:33,158 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:59:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:59:50,678 INFO L93 Difference]: Finished difference Result 135285 states and 186303 transitions. [2020-10-26 22:59:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:59:50,679 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2020-10-26 22:59:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:59:51,058 INFO L225 Difference]: With dead ends: 135285 [2020-10-26 22:59:51,058 INFO L226 Difference]: Without dead ends: 83181 [2020-10-26 22:59:51,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:59:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83181 states. [2020-10-26 22:59:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83181 to 83062. [2020-10-26 22:59:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83062 states. [2020-10-26 22:59:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83062 states to 83062 states and 111497 transitions. [2020-10-26 22:59:54,849 INFO L78 Accepts]: Start accepts. Automaton has 83062 states and 111497 transitions. Word has length 250 [2020-10-26 22:59:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:59:54,850 INFO L481 AbstractCegarLoop]: Abstraction has 83062 states and 111497 transitions. [2020-10-26 22:59:54,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:59:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 83062 states and 111497 transitions. [2020-10-26 22:59:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-26 22:59:54,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:59:54,860 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:59:54,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:59:54,861 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:59:54,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:59:54,862 INFO L82 PathProgramCache]: Analyzing trace with hash -299297836, now seen corresponding path program 1 times [2020-10-26 22:59:54,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:59:54,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103313755] [2020-10-26 22:59:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:59:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:55,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:55,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:56,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:56,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:56,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-26 22:59:56,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:59:56,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-26 22:59:56,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:59:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 22:59:56,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:57,113 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:59:57,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:59:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:57,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:57,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:57,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:59:57,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:57,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:59:57,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:57,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:57,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:59:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:57,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:57,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:57,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:59:57,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:57,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-26 22:59:57,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:57,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:59:57,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:57,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:59:57,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:57,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:59:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:57,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:57,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:57,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:59:57,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:57,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 22:59:57,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:57,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:57,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:59:57,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:59:57,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:59:57,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103313755] [2020-10-26 22:59:57,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:59:57,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:59:57,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182674969] [2020-10-26 22:59:57,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:59:57,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:59:57,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:59:57,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:59:57,864 INFO L87 Difference]: Start difference. First operand 83062 states and 111497 transitions. Second operand 7 states. [2020-10-26 22:59:59,461 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:00:01,781 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66